DEPARTMENT OF MECHANICAL ENGINEERINGEquipment: Horizontal and vertical 25 mm i.d. pipelines for...

University of Thessaly – School of Engineering

Volos, April 2009

DEPARTMENT OFDEPARTMENT OF

MECHANICALMECHANICAL

ENGINEERINGENGINEERING

Research Activities

1

THE UNIVERSITY OF THESSALY

The University of Thessaly was founded in 1984 in a region characterised by industrial and agricultural activities. The central administration of the University is located in Volos, conveniently located between Athens (320 km) and Thessaloniki (200 km). Volos offers visitors the pleasures of the sea the nearby islands as well as the adventures of Mount Pelion, a traditional Greek holiday and ski resort.

The University of Thessaly is organized in the following Schoolsand Departments distributed in four cities in the Region of Thessaly:

School of Humanities (Volos): Department of Primary School Education, Department of Pre-School Education, Department of Special Education, Department of History-Archaeology-Social Anthropology

School of Agricultural Sciences (Volos): Department of Agriculture: Crop Production & Agricultural Environment, Department of Agriculture: Animal Production & Marine Environment

School of Engineering (Volos): Department of Planning & Regional Development, Department of Mechanical Engineering, Department of Civil Engineering, Department of Architecture, Department of Computer and Communication Engineering

School of Health Sciences: Department of Medicine (Larissa), Department of Veterinary Medicine (Karditsa), Department of Biochemistry & Biotechnology (Larissa).

Independent Departments: Department of Physical Education & Sports Sciences (Trikala), Department of Economics Studies (Volos).

THE CITY OF VOLOS AND THE UNIVERSITY

The city of Volos built in the Pagasitikos Gulf, in the foot of Mount Pilion, is the mainly exit to the sea of the large agricultural region of Thessaly. The metropolitan area of Volos with a population of 120000 includes the municipalities of Volos, Nea Ionia, Iolkos and surrounding communities. Volos has evolved into an industrial centre and the third port of the country. Its economy is based on manufacturing industry, trade, services and tourism.

The relation of Volos with the University is determined by a dynamic and creative interaction between the academic community and the citizens of Volos. The spontaneous atmosphere of student life is diffused into the town with the lively interaction of students and residents bringing a new wealth of ideas to the youth of Volos (http://www.volos-m.gr).

2

MISSION AND OBJECTIVES OF THE GRADUATE STUDIES PROGRAM

The Department offers a graduate program leading to the degree of Doctor of Philosophy and to an Advanced Master of Science degree in Mechanical Engineering. Priority is given to doctoral candidates. Research is strongly emphasized because of its importance to the advancement of science and engineering and the vitality it adds to the education provided by the Department.

The graduate curriculum provides students with advanced scientific skills to conduct fundamental and applied research. The main goal of the graduate studies is the preparation of scientists and engineers to support the local, national and European industry, as well as the research institutions and universities.

The faculty is involved in a variety of fundamental and applied research in close collaboration with Greek and European industry. Novel results are systematically published in international, peer-reviewed scientific journals.

THE DEPARTMENT OF MECHANICAL ENGINEERING

The Department of Mechanical Engineering was founded in 1985 and admitted its first undergraduate students in 1990. The Department has a rapidly growing Mechanical engineering program with state-of-the-art educational and research activities. The Department is housed in modern facilities of the School of Engineering campus located in the city of Volos. The main teaching goal of the Department is to educate Mechanical engineers so that they can handle new technologies and become instrumental in the development and the management of efficient production processes of competitive industrial units.

The Department is developing modern teaching & research laboratory facilities in order to be able to participate in national, European and international teaching and research. It also seeks to establish a bridge between academic research and industrial development in the fields of mechanics, materials science, energy technology and production management. The faculty is providing expert R&D support to industrial units and government agencies, especially those located in central Greece.

The thin liquid film research facility

3

AREAS OF RESEARCH• Fluid mechanics & industrial applications, aeroelasticity,

magnetohydrodynamics, particle-gas/liquid flow, reacting flow, blood flow

• Biomechanics, interfacial and hydrodynamic stability• Transport phenomena, two-phase liquid/gas flow, analysis

and design of transport processes• Kinetic theory, non-equilibrium flows and transport

phenomena, microfluidics, vacuum flows• Internal combustion engines, design of energy systems,

pollution abatement technologies• Design and development of fuel cells and catalytic

materials for hydrogen production from biomass• Energy and water conservation in industry• Alloy Design, Computational Alloy Thermodynamics and

Kinetics, Automotive TRIP steels, Aircraft Aluminium and Magnesium Alloys, Hydrogen Trapping and Embrittlement, Welding HAZ Modelling

• Continuum mechanics, plasticity, fracture mechanics, computational mechanics, finite elements

• Non linear structural analysis – structural stability• Structural mechanics, analysis & design of steel structures• Probabilistic structural dynamics, structural identification

and control, structural reliability, design optimisation• Optimal, robust and adaptive systems control, estimation

and identification, robotics• Manufacturing processes, tribology, metrology, machine

tools, engineering design• Modelling and analysis of production-inventory systems,

operations research• Technology, innovation and knowledge management• Total quality management, reliability and maintenance• Transport science, logistics, network equilibrium and

optimisation methods• Analytical and numerical techniques in engineering

ADMISSION AND REQUIREMENTS

Admission to the Graduate ProgramStudents graduated from Greek or foreign universities are admitted as follows: • Graduates from all Engineering disciplines• Graduates of Physics, Chemistry, Mathematics and

Computer Science• Graduates of Technological Educational Institutes may also

be admitted upon successful examination.

Degree requirements

All admitted graduate students are required to pass successfully a series of graduate courses taught by the department faculty. Graduate students for the Advanced Master of Science degree are also required to complete a Graduate Research thesis. Graduate students for the Doctoral degree are required to complete a PhD thesis.

Degree Duration

The minimum duration of the Advanced Master of Science degree is two (2) semesters of courses and one (1) semester of research. The minimum duration of the PhD degree is three (3) years.

Course Fees - Scholarships

Graduate students are required to pay a fee of 900 Euros per semester. Course fees may be waived and scholarships may be awarded depending on academic qualifications and performance.

The

scan

ning

ele

ctro

n m

icro

scop

e

The

subs

onic

win

d tu

nnel

fac

ilit

y

Inte

rnal

com

bust

ion

engi

ne t

est

bed

4

DEPARTMENT DIVISIONS & LABORATORIES

Teaching and research in the Department of Mechanical & Industrial Engineering is carried out in three Divisions, each incorporating the following laboratories.

DIVISION OF ENERGY, INDUSTRIAL PROCESSES & POLLUTION ABATEMENT TECHNOLOGY

Laboratory of Alternative Energy Conversion Systems(Director: Assoc. Prof. P. Tsiakaras)

Thermodynamics, Environmental Catalysis, Catalytic Combustion, Chemical Reactor and Reaction Engineering, Fuel Cell Engineering, Batteries, Electric Vehicles

Laboratory of Fluid Mechanics & Turbomachinery(Director: Prof. N. Vlachos)

Fluid Mechanics, Aerodynamics, Pumps, Turbomachines, Wind Turbines, Aeroelasticity, Environmental Flows, Reacting Flow, Particle-gas/liquid Flow, Blood Flow, Magneto-hydrodynamics, Flow Diagnostics (Laser etc), Computational Fluid Dynamics

Laboratory of Thermodynamics & Thermal Engines(Director: Prof. T. Stamatelos)

Applied Thermodynamics, Internal Combustion Engines, Exhaust Emissions and Exhaust After-treatment, Industrial Refrigeration, Heating, Ventilation and Air Conditioning, Building Energy Systems

Laboratory of Transport Processes & Process Equipment(Director: Prof. V. Bontozoglou)

Transport Phenomena, Mass Transfer, Physical & Chemical Process Equipment, Analytical and Computational Methods in Thermal Science, Kinetic Theory of Gases, Pollution Abatement Technology, Renewable Energy Sources (biomass, geothermal etc.)

DIVISION OF MECHANICS, MATERIALS & MANUFACTURING

Laboratory of Manufacturing(Director: Assist. Prof. G. Petropoulos)

Manufacturing Technology, Machine Tools, Metrology, Tribology, Robotics

Laboratory of Materials(Director: Prof. G. Haidemenopoulos)

Structure-Property-Processing Relationships in Metals & Alloys, Physical Metallurgy, Materials Characterization, Mechanical Behaviour, TRIP Steels, Aluminium and Magnesium Alloys, Welding , Corrosion Testing, Fractography, Failure Analysis

Laboratory of Mechanics and Strength of Material(Director: Prof. N. Aravas)

Computational Mechanics, Elasticity, Plasticity, Fracture Mechanics, Continuum Mechanics, Strength of Materials, Mechanical Testing of Materials

Laboratory of System Dynamics(Director: Prof. C. Papadimitriou)

Analysis, Design and Optimization of Dynamic Systems, Vibrations and Dynamics of Machines, Uncertainty Analysis, Stochastic Structural Dynamics, Diagnostics & Reliability of Mechanical Systems

DIVISION OF PRODUCTION & INDUSTRIAL MANAGEMENT

Laboratory of Production Management (Director: Prof. G. Liberopoulos)

Operations Research & Management Science (Optimization, Stochastic Modelling, Discrete Event Dynamic System Simulation), Production and Operations Management (Planning & Control of Production-Inventory Systems, Reliability & Maintainability Engineering), and Transportation Science (Network Equilibrium and Optimization, Optimum Path Algorithms, Traffic Science)

Laboratory of Systems Optimization(Director: Prof. A. Ziliaskopoulos)

Stochastic Optimization Methods, Online and Robust Routing and Scheduling, Assignment Methods (Online and Offline, Equilibrium Modelling, Knapsack Algorithms

5

RESEARCH FACILITIES


Laboratory of Alternative Energy Conversion Systems:Fully computerised mass spectrometer – OmnistatBalzers, Fully computerized gas chromatographs (TCD, FID) - PerkinElmer, Sigma300 and Shimadzu, Gas analyzers (CH4, CO2, CO, O2, Η2, NOx) – Hartmann and Braun, Function generators – AMEL, Fully computerized mass flow controllers-Brooks, Fully computerized Electrochemical Station-AMEL system 5000, Digital multimeters, Duel Cells – SOFC type and PEMFC type.

Laboratory of Fluid Mechanics & Turbomachinery: Subsonic wind tunnel (50x70 cm2, 30 m/s), Supersonic wind tunnel (10x10 cm, Mach 1.5, under construction), Air tunnel (1in. jet, 50 m/s - 2×60 cm channel, 10 m/s), Laser Doppler anemometer (1-channel), Phase Doppler anemometer (1-channel), Hot wire anemometer (2-channels), In-house particle image velocimeter (PIV), Schlieren flow visualization, Video & digital camera, Workstations with printers and scanner, Computational Fluid Dynamics packages (GLASS3D, FUSION2D&3D, CORE2D, DIAN3D, TEACH, Aero-elasticity CAFFA2D, MHD CAFFA2D, FLUENT, PHOENICS), 2D and 3D Compu-tational Fluid Dynamic Finite Element & Boundary Element packages, Digital signal processing systems, Parallel programming on PC clusters.

Laboratory of Thermodynamics & Thermal Engines:Engine test cell with a 150 kW, Froude-Consinecomputer controlled eddy current dynamometer with TEXCEL 100 direct digital control system (transient testing capabilities), Controller linked to a PC Data Acquisition system, A DW10 2-liter HDI diesel engine. Engine management system (ECU) interfacing software and hardware, Ruggerini Brio 91 single cylinder engine with mini-scale filters and catalytic converters. Exhaust gas analyzers (CO, CO2, HC, NO), HC FID analyzer, Air and fuel flow meters, Catalytic converter and diesel filter systems. Specially designed test rig for detailed flow distribution measurements in catalytic converters and filters, Laboratory oven (900ºC max) for aging and regeneration of full-sized converters and diesel filters, Networked PC’s and peripherals, In-house software for performance computations of main types of exhaust after-treatment devices, integrated in the form of a CAE design toolkit, TRNSYS 15/IISiBat software for (advanced vehicle concepts, solar energy systems, building energy systems).

Laboratory of Transport Processes & Process Equipment: Horizontal and vertical 25 mm i.d. pipelines for gas-liquid flows, two inclined film flow channels, fluorescence imaging system, CCD and high-speed video cameras, heat exchanger test-bench, flow-pressure-temperature sensors/controllers, thermo-gravimetric analysis, bomb calorimeter, UV-spectro-photometer, gas chromatograph, water characterisation instruments (conductivity meter, pH meter, turbidity meter, viscometer, refractometer etc.), PC network, commercial and in-house software, cluster consisting of 24 PCs with 64 bit processors and 2 GB RAM each, in-house computer codes.Student-made model wing in the wind tunnel

6

RESEARCH FACILITIES (cont’d)


Laboratory of Materials: Metallurgical microscopes and stereomicroscopes. Hardness and microhardness testers, Heat treating furnaces, Metallographic specimen preparation facilities, Corrosion testing equipment. Thermal analysis equipment including differential scanning calorimeter (DSC) and dilatometer, Scanning electron microscope (SEM), Atomic force microscope (AFM), Laboratory CO2 laser facility with 2-axis CNC table, cutting head and vacuum chamber for Laser chemical vapor deposition (LCVD), Computational alloy thermodynamics software (Thermo-Calc), Computa-tional alloy kinetics software (DICTRA).

Laboratory of Manufacturing: Milling machine, Automatic lathes, Drilling machine, Piezoelectric dynamometers, Profilometer, Tool makers' microscope, Stereoscope, Vibration analyzer, Tribometer (pin on disc), Viscometers, Metrological height machine, Hardness meter.

Laboratory of Mechanics and Strength of Materials:Hardware: Unix workstation with 4 processors for parallel computing, 6 Unix workstations, printers, scanners. Software: Finite element package ABAQUS, and software for computational mathematics (Mathematica). KYOWA PCD-300A portable data acquisition unit that is suited for strain/displacement measurements in laboratory mechanical testing facilities as well as in-service structural applications under static and dynamic loading conditions; the unit enables the simultaneous measurement for 8 sensors (strain gauges or LVDT).

Laboratory of System Dynamics: Experimental structural dynamics hardware: 16-channel data acquisition system, K-beam accelerometers, Piezobeamaccelerometers, impulse force hammer, electro-mechanical shaker, power amplifiers. Computational dynamics software: SDTools (Experimental modal analysis, finite element modelling, structural dynamics and updating), ADAMS (dynamic analysis of multi-body systems), in-housed developed software for structural model updating and damage detection.


Laboratory of Production Management: It includes a Local Area Network of over ten PC's running on Windows 2000 Professional (built on NT technology), providing access to various software including software on statistical analysis, optimization, discrete event system simulation, enterprise resource planning, total productive maintenance, queuing model analysis, and process system modelling.

Laboratory of Systems Optimization: 10 Workstations, a unix cluster composed of three SuperMicro dual-processor UNIX servers and one Win2003 Server, a number of printing and communication devices used in the lab’s research, such as GPS-enabled phones, fully autonomous GPS tracking units etc. Fully equipped development environments for java, PHP, C++, Fortran, AIR. GIS applications, Web 2.0 applications for GIS data, spatial data databases, optimization software such as AMPL/CPLEX.

7

GENERAL FACILITIES

Computer CentreA modern Digital Computer Centre has been developed to serve the educational and research needs of the Department. Two local networks based upon the TCP/IP and Novell/IPX protocols are connected with the GUnet and GRnet networks to facilitate communication with other computing sites in Greece and worldwide via Internet.

LibraryThe scientific literature needs of students, researchers, and faculty of the Department are met by the University Central Library, the collections of which are fully computerized. Students and researchers have access to the majority of journals in the field of Mechanical and Industrial Engineering via the University Intranet.

Electromechanical WorkshopThe teaching and research activities of the Department are supported by the Electro-Mechanical Workshop where test sections and special constructions are manufactured.

8

GRADUATE COURSES OFFERED

ACADEMIC YEARS 2008-2009 & 2009-2010


• Advanced Fluid Mechanics

• Advanced Transport Phenomena

• Chemical Process Engineering

• Computational Fluid Dynamics & Heat Transfer

• Design & Analysis of Electrochemical Processes

• Internal Combustion Engines - Chemically Reacting Flows

• Internal Combustion Engines - Thermodynamics & Gas Dynamics

• Kinetic Theory and Microfluidics

• Measurement Techniques in Thermal Sciences

• Stability of Thermo-Hydraulic Systems

• Turbulent Flow Phenomena

• Two-phase Flows and Phase Change


• Advanced Probability & Statistics

• Optimization and Flows of Networks with Applications to Logistics

• Optimization Theory

• Production Systems

• Quality, Reliability and Maintenance of Engineering Systems

• Scheduling - Project Management

• Simulation of Manufacturing Systems

• Stochastic Processes


• Advanced Computational Dynamics

• Advanced Control Theory

• Advanced Finite Element Methods

• Advanced Mechanical Behaviour of Materials

• Advanced Physical Metallurgy

• Advanced Tribology

• Continuum Mechanics

• Fracture Mechanics

• Multivariable Control Systems

• Non Linear Structural Analysis - Stability

• Physical Models of Manufacturing Processes

• Plasticity

• Probabilistic Structural dynamics

• System Dynamics

GENERAL COURSES

• Advanced Engineering Mathematics

• Advanced Numerical Analysis

• Differential and Integral Equations

Teac

hing

in

the

Clas

sroo

m

9

SUMMER SCHOOLS

The faculty has been actively involved in the organisation of several education-oriented summer schools, attracting instructors and students from home and abroad.

Seventh School and Workshop on Fusion Physics and TechnologyVolos, Greece, 14-19 April 2008Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, D. Valougeorgis, N. Pelekasis

Sixth School of Fusion Science and TechnologyVolos, Greece, 26-31 March 2007Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, D. Valougeorgis, N. Pelekasis

Fifth School of Fusion Science and TechnologyVolos, Greece, 10-14 April 2006Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, D. Valougeorgis, N. Pelekasis,

A. Grecos

Eighteenth School on Nonlinear Science & ComplexityVolos, Greece, 15-30 July 2005Organizers: Prof. A. Bountis (University of Patras) and

Prof. N. Vlachos (University of Thessaly)

Fourth School of Fusion Science and TechnologyVolos, Greece, 18-23 April 2005Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, A. Grecos, D. Valougeorgis,

N. Pelekasis

Third School of Fusion Science and TechnologyVolos, Greece, 29 Mar. - 2 Apr. 2004Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, A. Grecos, D. Valougeorgis,

N. Pelekasis

Diffusion Phenomena in Engineering and Environmental FlowsVolos, Greece, 8-18 July 2003Instructors : Prof. J. Redondo (University of Catalunya, Spain)Prof. H. Stapountzis (University of Thessaly, Greece)Prof. Stavros Tavoularis (University of Ottawa, Canada)Prof. Ch. Vassilicos (Imperial College, UK)

Numerical Methods for Finite Strain Elastoplastic ProblemsVolos, Greece,18-29 August 2003Instructor: Prof. N. Aravas (Univ. of Thessaly, Greece)

Second School of Fusion Science and TechnologyVolos, Greece, 22-27 May 2003Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. N. Vlachos, A. Grecos, D. Valougeorgis,

N. Pelekasis

First School of Fusion Science and TechnologyVolos, Greece, 16-21 May 2002Supported by Association Euratom - Hellenic RepublicOrganizers: Profs. A. Grecos, N.S. Vlachos, D. Valougeorgis

First School of Fusion Science & Technology - Volos 16-21 May 2002

Nikolaos AndritsosAssociate Professor Experimental Transport Phenomena

Research Interests and Activities

Research interests include the flow of two-phase mixtures in pipelines, the formation and control of scale deposits in industrial systems (heat exchangers, geothermal water equipment, oil and gas transportation systems, RO and UF membrane systems etc.), water conservation and water recycling in industrial systems, exploitation of geothermal energy (including geoexchange systems) and stone deterioration and conservation.

Present research projects focus on the following areas:

(1) A better understanding of two-phase flows and particularly: (i) effect of fluid properties on the gas-liquid flow in a horizontal and near-horizontal pipeline. The construction of a vertical pipeline is also underway. (ii) Effect of drag-reducing polymers on two-phase flow characteristics. The above projects have been partially funded by a PYTHAGORAS Project (GSRD) and the ONASION Foundation through a scholarship.

(2) The development of suitable strategies and a design methodology for water minimization and reuse in selected textile industries in the Region of Thessaly in order to reduce water costs and to comply with national and EC wastewater and other directives. The project is funded by the GSRD and the EC through the Regional Innovation Pole of Thessaly.

Selected PublicationsTzotzi, C., Pahiadaki, T., Andritsos, N., Yiantsios, S.G. and Karabelas, A.J. An

experimental study of CaCO3 scaling of RO and NF membranes in cross-flow filtration. J. Membrane Sci., 296, pp. 171–184, 2007.

Kelessidis, V.C., Karydakis, G. and Andritsos, N. Flow production characteristics of low-enthalpy geothermal artesian wells and analysis for a better design of future well drilling parameters. Geothermics, 36, pp. 243-264, 2007.

Spanos, N., Patis, Α., Kanellopoulou, D., Andritsos, N. and Koutsoukos, P.G. Precipitation of calcium phosphate from Simulated Milk Ultra-Filtrate solutions. Crystal Growth & Design, 7, pp. 25-29. 2007.

Andritsos, Ν. and Karabelas, A.J. Calcium carbonate scale formation in the presence of particles. Int. J. Heat Mass Transfer, 46, pp. 4629-4638, 2003.

Fytikas, M. and Andritsos, N. Geothermal Energy – Geothermal Resources, Geothermal Fluids, Applications, Environment. Tziolas Editions, Thessaloniki, Greece (2004). [In Greek]

10

Dr Andritsos received his Diploma in Chemical Engineering from AUTh in 1979, his M.Sc. from University of Manchester (U.K.) in 1981 and his Ph.D. in Chemical Engineering from the University of Illinois at Urbana-Champaign (USA). He joined the faculty at Volos in 2003. Before joining the Department, he was affiliated with the Chemical Process Engineering Research Institute in Thessaloniki for 16 years.

ContactTel.: +30-24210-74072, Fax: +30-24210-74085E-mail: [email protected], website: http://www.mie.uth.gr/Andritsos.html

CaCO3 deposits on an RO membrane.

Nikolaos AravasProfessor Computational Mechanics of Structures


Professor Aravas’ research is in the areas of Mechanics of Materials, Computational Mechanics and Finite Element Methods, Plasticity, Fracture Mechanics, Metal Forming, Continuum Mechanics, and Biomechanics.

In particular, Prof. Aravas has worked on the development of crack-tip asymptotic solutions in ductile materials, the analysis of testing methods for material interfaces such as the peel test, the development of numerical methods for the integration of elastoplastic models, on constitutive models for the anisotropic plastic behavior of polymers and the plasticity and creep of metal-matrix composites reinforced by continuous aligned fibers, on strain-gradient elasticity and plasticity theories with applications in nano-materials, the mechanics of Transformation Induced Plasticity (TRIP), the mechanics of metal forming, and the mechanics of the human foot.

Recent research projects focus on the following areas:

(1) A research effort combining state-of-the-art modeling and simulation with experiment is used to characterize damage, constitutive response, and fracture in solid propellant materials. The integrated effort relies upon detailed electron microscopy studies of particle dewetting and in situ crack propagation along with systematically acquired experimental data in conjunction with inverse methods and systematic fracture toughness testing of cracked geometries to understand the failure mechanisms. The principles of mechanics of materials along with finite element methodology are used to investigate and characterize the mechanical response of a solid propellant under both static and dynamic loadings. This work is carried out in collaboration with faculty of the Department of Mechanical Science and Engineering of the University of Illinois at Urbana Champaign and is supported by the “Center for Simulation of Advanced Rockets” funded by the U.S. Department of Energy.

(2) Theories with intrinsic-length-scales find applications in the modeling of size-dependent phenomena. In elasticity, length scales enter the constitutive equations through the elastic strain energy function, which, in this case, depends not only on the strain tensor but also on gradients of the rotation and strain tensors. A “mixed” finite element formulation is developed, in which both the displacement and the displacement-gradients are used as independent unknowns and their relationship is enforced in an “integral sense”. The proposed technique is applied to a number of problems in the areas of nano-materials and textile products. The project is funded by the GSRD and the EC through the Regional Innovation Pole of Thessaly.

Selected PublicationsAravas, N., Laspidou C.S., On the calculation of the elastic modulus of a biofilm

streamer. BIOTECHNOLOGY AND BIOENGINEERING 101, 196-200, 2008.Xu F, Aravas N, Sofronis P., Constitutive modeling of solid propellant materials with

evolving microstructural damage. J. MECHANICS & PHYSICS OF SOLIDS 56, 2050-2073, 2008

Xu F., Sofronis P., Aravas N., et al. Constitutive modeling of porous viscoelasticmaterials. EUROPEAN J. MECHANICS A-SOLIDS 26, 936-955, 2007

Haidemenopoulos G.N., Katsamas A.I., Aravas N., Stability and constitutive modellingin multiphase TRIP steels. STEEL RESEARCH INTERNATIONAL 77, 720-726, 2006.

Papatriantafillou I., Agoras M., Aravas N., et al. Constitutive modeling and finite element methods for TRIP steels. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 195, 5094-5114, 2006.

11

Dr Aravas received his Diploma in Mechanical Engineering from the Aristotle Univeristy of Thessaloniki in 1980, his M.Sc. (1982) and Ph.D. (1985) in Theoretical and Applied Mechanics from the University of Illinois at Urbana Champaign (USA). He joined the faculty at Volos in 1996. Before joining the Department, he was a Professor of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania (USA) (1986-1996), and a Senior Engineer at Hibbitt, Karlsson & Sorensen (1985), the developers of the ABAQUS general-purpose finite element program. At the University of Thessaly Prof. Aravas has served as Vice Rector for Research and Development (1999-2002) and Dean of Engineering (2004-2007). Professor Aravas is currently the Director of the Mechatronics Institute (IMTRONICS) at the “Centre for Research and Technology -Thessaly” (CE.RE.TE.TH.).

ContactTel: +30-24210-74002, Fax: +30-24210-74009E-mail: [email protected], website: http://www.mie.uth.gr/Aravas.html

Vasilis BontozoglouProfessor Transport Phenomena – Process Equipment


Research interests include the flow of liquids with a free surface and the analysis of related heat and mass transfer phenomena. Also, the study of diffusion in heterogeneous solids and liquids.

Representative research projects are the following:

(1) Gravity-driven film flows are central to a variety of process equipment. The objective of this project is to understand the complex dynamics of the free surface with increasing flow rate, which includes development and interactions of solitary waves, transition to three-dimensional instabilities and finally establishment of interfacial turbulence. Our experiments are done in a large inclined facility and rely predominantly on optical measuring techniques. Direct numerical simulations are also undertaken, based on the finite-element method.

(2) The geometrical characteristics of the solid wall bounding a liquid film may profoundly affect the flow behavior. These effects are important in film coating and also as a means of enhancement of heat/mass transfer rates in process equipment. We study resonance phenomena triggered by periodic corrugations and strong localized modifications of the flow caused by isolated topography. Again, experiments are combined with numerical simulations.

(3) Bubble growth from a liquid solution occurs in numerous industrial applications. The fundamental interaction between diffusion and growth-induced convection is masked by natural convection phenomena. Thus, this project performs experiments in zero-gravity (ESA) and investigates the growth of bubbles from a locally super-saturated liquid. Interpretation of the observations is assisted by semi-analytical and numerical solution of models of growing complexity (collaboration with the Dept of Chemistry, University of Thessaloniki.

Selected PublicationsBontozoglou, V., Serifi, K., Falling film flow along steep two-dimensional

topography: The effect of inertia. Int. J. Multiphase Flow, 34, 734-747, 2008.Wierschem, A., Bontozoglou, V., Heining, C., et al. Linear resonance in viscous films

on inclined wavy planes. Int. J. Multiphase Flow, 34, 580-589, 2008.Divinis, N., Karapantsios T.D., de Bruyn R., Kostoglou, M., Bontozoglou, V., Legros,

J.C., Lateral motion and interaction of gas bubbles growing over spherical and plate heaters. Microgravity Sci. & Technology, 18, 204-209, 2006.

Argyriadi, K., Vlachogiannis, M. & Bontozoglou, V. Experimental study of inclined film flow along periodic corrugations: The effect of wall steepness. Phys. Fluids, 18, 012102:1-15, 2006.

Tihon, J., Serifi, K., Argyriadi, K. & Bontozoglou, V. Solitary waves on inclined films: Their characteristics and the effects on wall shear stress. Exp. Fluids, 41, 79-89, 2006.

12

Dr Bontozoglou received a Diploma in Chemical Engineering from AUTh(1982), and MSc (1986) and PhD (1988) from the University of Illinois at Urbana-Champaign (USA). Before joining the faculty of the University of Thessaly in 1993, Dr Bontozoglouwas affiliated for 4 years with the Chemical Process Engineering Research Institute in Thessaloniki. He is presently Director of the Laboratory of Transport Processes & Process Equipment, and serves as national representative in EuroTherm Committee for the advancement of Thermal Sciences in Europe.

ContactTel: +30-24210-74069, Fax: +30-24210-74085E-mail: [email protected], website: http://www.mie.uth.gr/Bontozoglou.html

Gregory N. HaidemenopoulosProfessor Physical Metallurgy-Alloy Design


Structure-Processing-Properties-Performance interactions in metallic materials. Application of computational alloy thermodynamics and kinetics in alloy design and simulation of heat treatments and welding processes. Hydrogen trapping and embrittlement in high-strength aluminium alloys. Microstructure, Mechanical Properties and Corrosion of Magnesium Alloys.

Research activities are focused on the following projects:

[1] Design of bainite in steels from homogeneous and inhomogeneous micro-structures using physical approaches (RFCS Project 2007-2010).

Extensive use of computational thermodynamics and kinetics for the development of modelling approaches for the bainitic transformation in steels. These approaches will be placed on a broader basis and will be fitted to new experimental data. So the development of bainiticmicrostructures in complete groups of modern bainitic- and cold rolled TRIP-, CP-, and DP-steels can be calculated. The use of the new approach will allow designing bainitic structures for improved material properties and will give information about basic physical processes governing the formation of bainite.

[2] Aeronautical Application of Wrought Magnesium-AEROMAG (STREP Project 2005-2008)

The technical focus of the program is the development of new Magnesium wrought products (sheets and extrusions), that provide significantly improved static and fatigue strength properties. The strength properties of these innovative materials are required to be as high as AA5083 for non-structural applications and as high as AA2024 aluminium alloys for secondary structure applications. Appropriate manufacturing (rolling, extrusion), forming and joining technologies require development, simulation and validation for the innovative material and application. Corrosion is a problem to be solved with newly adapted and environmentally friendly surface protection systems and advanced design concepts. Flammability will be addressed with addition of chemical elements and special surface treatments. A further essential task is the development of material models and failure criteria for the prediction of forming processes, plastic deformation and failure behaviour of components.

[3] Design of new high-strength Al-Mg alloys with additions of Zr and Sc (PAVE Project 2006-2008)

The objective of this research project is the strength improvement of thick sheets at the as hot-rolled state. For the fabrication of such alloys, the influence of the alloying elements Zrand Sc on microstructure, microsegregation, homogenization, mechanical properties and corrosion resistance is to be evaluated.

Selected PublicationsG.N. Haidemenopoulos, A. Katsamas and A. Aravas, Multiscaling Effects in TRIP

Steels, in Multiscaling in Molecular and Cintinuum Mechanics: Interaction of Time and Size from Macro to Nano, ed. G. Sih, Springer, 2007.

H. Kamoutsi, G.N. Haidemenopoulos, V. Bontozoglou and S. Pantelakis, Corrosion-Induced Hydrogen Embrittlement in Aluminum Alloy 2024, Corrosion Science, 48, 1209-1224, 2006.

I. Papatriantafillou, M. Agoras, N. Aravas and G.N. Haidemenopoulos, Constitutive Modeling and Finite Element Methods for TRIP Steels, Computer Methods in Applied Mechanics & Engineering, 195, 5094-5114, 2006.

G.N. Haidemenopoulos, A. Zervaki, P. Terezakis, J. Tzanis, A.E. Giannakopoulos, Investigation of Rolling Contact Fatigue Cracks in a Grade 900A Rail Steel of a Metro Track, Fatigue and Fracture of Engineering Materials and Structures, 29, 887-900, 2006.

G.N. Haidemenopoulos, A.I. Katsamas, N. Aravas, Stability and Constitutive Modelling in Multiphase TRIP Steels (invited paper), Steel Research Int., 77, No. 9-10, 720-726, 2006.

13

Dr Haidemenopoulos received his Diploma in Mechanical Engineering in 1982 from AUTh and his Ph.D. in Physical Metallurgy from Massachusetts Institute of Technology (MIT), USA, in 1988. He joined the faculty at Volos in 1992.

ContactTel/Fax: +30-24210-74061E-mail: [email protected], website: http://www.mie.uth.gr/Haidemenopoulos.html

Spyros A. KaramanosAssistant Professor Structural Mechanics and Finite Elements


My research focuses on the development of Computational and Analytical Methods for Stress Analysis, Structural Stability and Fatigue. Applications refer mainly to Steel Structures, including Tubular Structures, Industrial Equipment (e.g. Tanks, Pressure Vessels, Piping, Chimneys), Onshore and Marine Pipelines, Offshore Structures, and Steel Bridges. Present research activities include:

(1) Buckling of steel cylindrical shells. Development of computational methods for bifurcation and post-buckling response in shells with significant plastic deformations. Special emphasis is given on pipelines, accounting of the manufacturing process effect. Part of the work is directed towards improvement of European Design Recommendations for shell stability.

(2) Buckling of elastic cylindrical and spherical shells, using numerical models for simulating isotropic and anisotropic behaviour. Applications include typical thin steel shells for industrial applications (tanks and chimneys), as well as biomechanics, biomedical components and carbon nanotubes.

(3) Fatigue of high-strength steel welded connections, for marine structures, pipelines and risers, as well as for steel bridges. The work is experimental and analytical, aimed at developing new design tools for welded high-strength steel connections.

(4) Analysis and design of steel structures under severe earthquake loading. Special issues, such as the effect of material variability as well as retrofitting of existing structures with steel components, are investigated.

(5) Structural assessment and “fitness-for-purpose” of industrial structures (tanks, pressure vessels, piping, chimneys) and buried pipelines (water, oil and gas) under severe loading, with emphasis on earthquake action.

The above research activities are funded mainly by the European Union, and merit-based research scholarships from Greek Scholarship Foundations

Selected PublicationsDama E., Karamanos, S. A., and Gresnigt A. M. Failure of Locally Buckled Pipelines.

Journal of Pressure Vessel Technology, ASME, 129, pp. 272-279, 2007. Patkas, L. A. and Karamanos, S. A. Variational Solutions of Liquid Sloshing in

Horizontal-Cylindrical and Spherical Containers. Journal of Engineering Mechanics, ASCE, 133, pp. 641-655, 2007.

Houliara, S. and Karamanos, S. A., Buckling and Post-Buckling of Pressurized Thin-Walled Elastic Tubes Under In-Plane Bending. Int. Journal of Nonlinear Mechanics, 41, pp. 491-511, 2006.

Karamanos, S. A., and Andreadakis, K. P., Denting of Internally Pressurized Tubes Under Lateral Loads. Int. J. Mechanical Sciences, 48, pp. 1021-1196, 2006.

Karamanos, S. A., Romeijn, A. and Wardenier, J. Stress Concentrations in Multi-planar Tubular DT-Joints for Fatigue Design. Journal of Structural Engineering, ASCE, 126, pp. 1320-1330, 2000.

14

Dr Karamanos received his Diploma in Civil Engineering (1989) from NTU Athens with highest honors, his M.Sc. (1991) and his Ph.D. (1993) in Structural Engineering from The University of Texas at Austin (USA). He joined the faculty at Volos in 1999. Before joining the Department, he was affiliated with EGNATIA ODOS AE in Thessaloniki, Greece, as a structural engineer, and with Delft University of Technology, The Netherlands, as a Post-Doctoral Fellow in Steel Structures.

ContactTel: +30-24210-74086, Fax: +30-24210-74012.E-mail: [email protected], website: http://www.mie.uth.gr/karamanos.html

Alexis KermanidisLecturer Mechanical Behavior of Metallic Materials


Mechanical behaviour of metallic materials and experimental procedures in the topics of fatigue and fracture. Fatigue crack growth analysis/prediction under constant and irregular loading conditions. Effect of corrosion on the mechanical performance of materials. Relevant research project he has been involved in:

[1] WELAIR , CEC 2004-2007 “Development of short distance WELding concepts for AIRframes” The goal is to develop short distance welding concepts to control the run-in and outs and additionally, to improve the damage tolerance behaviour through the optimisation of the weld quality, the use of new high performance aluminium alloys or new joint configurations suitable for short distance welded airframe components. Partners: Airbus EADS , Piaggio, GKSS ONERA Dassault-Aviation, UPatras etc.

[2] IDA, CEC 2002-2004 ‘Investigation on Damage Tolerance of Aircraft Aluminium Alloys’. The aim was to establish a comprehensive understanding of the microstructure vs. fatigue crack growth-relationship primarily in 2024 Al-Alloy sheet sheet and plate. Very limited work was conducted on 6056 LBW butt-joints, FSW was addressed. Recommendations were provided in order to design improved materials with respect to damage tolerance properties. Assessment of damage tolerance was performed with new crack growth prediction models based on the microstructuralfeatures investigated. Partners: EADS CRC-F EADS CRC-D, ALENIA, Pechinet, University of Limerick, UPatras etc

[3] ‘Corrosion and Hydrogen Embrittlement of Aircraft Aluminum Alloys’, PENED, 1998-2000. Partners: University of Thessaly, University of Patras, Hellenic Aerospace Industry. The objective of the research is to investigate hydrogen uptake and trapping during corrosion of Al-alloys. The effect of hydrogen trapping was quantified with tensile, fracture toughness and fatigue testing.

Selected PublicationsC. Rodopoulos and Al. Th. Kermanidis, Understanding the Effect of Block Overloading

on the Fatigue Behaviour of 2024-T351 Aluminium Alloy Using the Fatigue Damage Map. International Journal of Fatigue, 29, pp. 276–288, 2007.

Al.Th. Kermanidis, P.V. Petroyiannis and Sp.G. Pantelakis, Fatigue and Damage Tolerance Behaviour of Corroded 2024 T351 Aircraft Aluminum Alloy. Theoretical and Applied Fracture Mechanics, 43, pp. 121-132, 2005.

J. Z. Zuo, Al. Th. Kermanidis, Sp. G. Pantelakis, Strain Energy Density Prediction of Fatigue Crack Growth from Hole of Aging Aircraft Structures. Theoretical and Applied Fracture Mechanics, 38, pp. 37-51, 2002.

Al. Th. Kermanidis, Sp. G. Pantelakis, Fatigue Crack Growth Analysis of 2024 T3 Aluminum Specimens Under Aircraft Service Spectra. Fatigue and Fracture of Engineering Materials and Structures, 24, pp. 699-710, 2001.

15

Dr Kermanidis received his Diploma in Civil Engineering in 1996 and his Ph.D. in Mechanical Behaviour of Materials from University of Patras in 2003. He joined the faculty at Volosin 2007.

ContactTel: +30-24210-74014, Fax: +30-24210-74009E-mail: [email protected]

George KozanidisLecturerOptimization Methods in Production/Service Systems


Operations Research: Integer Programming, Design and Analysis of Optimization Algorithms, Stochastic control of production/transportation systems, MultiobjectiveOptimization.

Currently undergoing research focuses on:

1. Flight and maintenance planning of mission aircraft for maximum fleet availability (with A. Gavranis and G. Liberopoulos). Our aim is to design, develop and apply scientific tools (mathematical programs, optimization algorithms, simulation models, etc.) for addressing the problem of producing an optimal flight and maintenance plan that maximizes the availability of a unit of aircraft over a given planning horizon. The goal is to integrate these tools into an online decision support system that will enable the user to enter a specific instance of this problem and combine them in order to solve it. The problem arises in several real applications, such as planning for military aircraft, fire-fighting aircraft, rescue helicopters, etc.

2. Optimal production scheduling in a chemical industry (with G. Liberopoulos and O. Hatzikonstantinou). We address the problem of compiling an optimal production schedule for a chemical plant that produces several different grades of final product. Our aim is to issue a production schedule that minimizes the cost associated with the number of grade changeovers, due to the fact that such changes result in low quality intermediate products with undesirable variations.

Selected PublicationsKozanidis, G., A multiobjective model for maximizing fleet availability under the

presence of flight and maintenance requirements. Journal of Advanced Transportation, accepted, 2009.

Kozanidis, G., Solving the linear multiple choice knapsack problem with two objectives: profit and equity. Computational Optimization & Applications, in press, 2009.

Kozanidis, G., Gavranis, A., Liberopoulos, G., Heuristics for maximizing fleet availability subject to flight and maintenance requirements. Proceedings of the 10th International Conference on Application of Advanced Technologies in Transportation, Athens, Greece, May 27-31, 2008.

Liberopoulos, G., Kozanidis, G., Tsarouhas, P., Performance evaluation of an automatic transfer line with WIP scrapping during long failures. Manufacturing & Service Operations Management, 9 (1), 62-83, 2007.

Kozanidis, G., Melachrinoudis, E., A branch & bound algorithm for the 0-1 mixed integer knapsack problem with linear multiple choice constraints. Computers & Operations Research, 31, 695-711, 2004.

16

Dr Kozanidis holds a Diploma from the University of Thessaly in Greece (1997), a MSc from Boston University in USA (1998) and a MScand a PhD, both from Northeastern University in USA (2002). Between 2004 and 2007 he was an Adjunct Professor and a Postdoctoral Researcher at the Department. He joined the faculty as a Lecturer in 2007.

ContactTel: +30-24210-74057, Fax: +30-24210-74059E-mail: [email protected], website : http://www.mie.uth.gr/kozanidis.html

George LiberopoulosProfessor Production Management


Our research interests are in the area of production & operations management, operations research, applied probability and automatic control.

Some of our current research projects are:

Quantitative Analysis of the Impact of Stockouts in Inventory Management. The aim of this research is to quantify the effect of the loss of customer goodwill following a stockout. To this end, we look at newsvendor-type models of several suppliers that compete for customer goodwill based on past product availability. For such models, we formulate the problem of finding optimal stationary ordering policies for the suppliers at Nash equilibrium as a stochastic dynamic game. The project is funded by Greece’s Ministry of Education through a HERAKLITUS grant.

Modeling Greece’s Electricity Market. Electricity market deregulation has triggered a number of significant changes in Greece’s energy sector, mostly by allowing private-owned companies to become producers and suppliers of electricity. This research examines the Day-Ahead-Scheduling (DAS) program recently introduced by the new “Grid Control and Power Exchange Code for Electricity” which forms the basis of the wholesale electricity market operation. DAS aims at minimizing the total cost of serving energy load for the next day, under conditions of good and safe system operation, while ensuring adequate reserves. The project is funded by Greece’s Regulatory Authority for Energy.

Optimal Production Scheduling for Minimum Product Grade Changeovers in Chemical Process Industries. We study the problem of production scheduling of a chemical plant that produces several different grades of the same type of product. The final products are stored in a number of outbound silos. From there, they are either loaded onto silo trucks or bulk containers or they are packed into big bags and then stored into a warehouse before being delivered to customers. The goal is to minimize the number of grade changeovers, because such changes result in the production of a quality-inferior product. The project is funded by the GSRT and VPI S.A. through a PENED grant.

Selected PublicationsLiberopoulos G. On the tradeoff between optimal order-base-stock levels and

demand lead-times. European Journal of Operational Research, 190, 136-155 2008.

Liberopoulos, G., Kozanidis, G., Tsarouhas, P. Performance evaluation of an automatic transfer line with WIP scrapping during long failures. Manufacturing & Service Operations Management, 9 (1), 62-83, 2007.

Koukoumialos, S., Liberopoulos, G. An analytical method for the performance evaluation of echelon kanban control systems. OR Spectrum, 27 (2-3), 339-368, 2005.

Liberopoulos, G., S. Koukoumialos. Tradeoffs between base stock levels, numbers of kanbans and production lead times in production-inventory systems with advance demand information. International Journal of Production Economics, 96 (2), 213-232, 2005.

Karaesmen, F., G. Liberopoulos, Y. Dallery. The value of advance demand information in production/inventory systems. Annals of Operations Research, 126 135-157, 2004.

17

Dr Liberopoulos received his B.S. and M. Eng. in Mechanical Engineering from Cornell University (USA) in 1985 and 1986, respectively, and his Ph.D. in Manufacturing Engineering from Boston University (USA) in 1993. In 1993 he was a Lecturer in the Department of Manufacturing Engineering at Boston University, and during 1994-1996 he was a Visiting Scientist in Laboratoire d’ Informatique at Université Pierre et Marie Currie (France). In 1996, he joined the Department of Mechanical Engineering at the University of Thessaly, where he is currently Professor of Production Management and Director of the Production Management Laboratory.

ContactTel: +30-24210-74056, Fax: +30-24210-74059E-mail: [email protected], website: http://www.mie.uth.gr/Liberopoulos.html

Pandelis DimitrisAssistant Professor (elect)Stochastic Models of Operations Research in Industrial Management


His research interests are in the areas of applied probability theory, stochastic optimization, queueing networks, flexible manufacturing systems, and scheduling and resource allocation problems.

Selected PublicationsPandelis, D.G. Optimal control of flexible servers in two tandem queues with

operating costs. Probability in the Engineering and Informational Sciences, 22, 107-131, 2008.

Pandelis, D.G. Optimal preemptive scheduling on uniform machines with discounted flowtime objectives. European Journal of Operational Research, 177, 630-637, 2007.

Pandelis, D.G. and Teneketzis, D. On the optimality of the Gittins index rule for multi-armed bandits with multiple plays. Mathematical Methods of Operations Research, 50-3, 449-461, 1999.

Pandelis, D.G. and Teneketzis, D. A simple load balancing problem with decentralized information. Mathematical Methods of Operations Research, 44-1, 97-113, 1996.

Pandelis, D.G. and Teneketzis, D. Optimal multiserver stochastic scheduling of two interconnected priority queues. Advances in Applied Probability, 26, 258-279, 1994.

18

Dr. Pandelis his diploma in Naval Architecture and Marine Engineering from the National Technical University of Athens in 1987 and his M.Sc. and Ph.D degrees in Electrical Engineering: Systems from the University of Michigan in 1990 and 1994 respectively. After his doctoral studies he worked in the USA as a Research Scientist for ERIM International (1994-2000) and Tellabs Operations (2000-2001). He was an Instructor in the Department of Mechanical Engineering of the University of Thessaly from 2003 to 2008, when he was elected Assistant Professor of Stochastic Models of Operations Research in Industrial Management.

ContactTel: +30-24210-74…., Fax: +30-24210-74….E-mail: ………[email protected], website : http://www.mie.uth.gr/.................html

Costas PapadimitriouProfessor Structural Dynamics


Research interests include probabilistic structural dynamics, structural identification and health monitoring, finite element model validation and updating, structural damage diagnosis and lifetime prognosis, sensor density and topology optimisation, Bayesian inference for uncertainty quantification, stochastic simulation methods for uncertainty propagation in structural mechanics, structural reliability, stochastic fatigue, design optimization under uncertainty.


[1] Earthquake Protection of Bridges (2003-2007). Funding: Greek Secretariat of Research and Technology. Partners: Consortium of Greek Universities, Institutes and Companies.

The objective of our group is to develop and test analytical methodologies for diagnostic monitoring of bridge integrity using vibration measurements. Emphasis is given to the automation of a smart data processing system for continual, on-line, global and comprehensive structural health monitoring. Specifically, the following methods are developed and integrated into a software tool:• Modal Identification methods using ambient/earthquake excitations • Optimal experimental design methodologies for model identification and for response reconstruction at unmeasured locations • Sophisticated damage detection tools based on finite element model updating and probabilistic methods accounting for modeling and data processing uncertainties• Robust global optimization tools needed in modal identification, model updating, damage detection and optimal sensor location methods• Validation with small-scaled laboratory and full-scale field test experiments

[2] Dynamic Response and Design Optimisation of Vehicle Structures (2005-2009). Funding: Greek General Secretariat of Research and Technology. Partners: Aristotle University of Thessaloniki

The project aims at the development of methodologies for (a) investigating the nonlinear dynamic response of vehicle structures with nonlinear suspensions (b) validating and updating the vehicle models using vibration measurements, and (c) optimizing the vehicle design under loading and structural uncertainties. Linear and nonlinear models for the substructures are considered. Performance indices are introduced that take into account structural safety considerations (e.g. fatigue), ride performance and passenger comfort. Uncertain road profiles as well as structural uncertainties are incorporated in the methodology and appropriate solutions techniques are developed to solve the computationally time consuming design optimization problem.

Selected PublicationsNtotsios, E., Papadimitriou, C., Panetsos, P., Karaiskos, G., Perros, K., Perdikaris,

P.C., Bridge Health Monitoring System based on Vibration Measurements. Bulletin of Earthquake Engineering, DOI 10.1007/s10518-008-9067-4, 2008.

Christodoulou, K., Ntotsios, E., Papadimitriou, C., Panetsos, P., Structural Model Updating and Prediction Variability using Pareto Optimal Models. Computer Methods in Applied Mechanics and Engineering, 198, 138–149, 2008.

Christodoulou, K., Papadimitriou, C., Structural Identification Based on Optimally Weighted Modal Residuals. Mechanical Systems and Signal Processing, 21, 4-23, 2007.

Papadimitriou, C., Pareto Optimal Sensor Locations for Structural Identification. Computer Methods in Applied Mechanics and Engineering, 194(12-16), 1655-1673, 2005.

Papadimitriou, C., Beck J.L., Katafygiotis, L.S., Asymptotic Expansions for Reliability and Moments of Uncertain Systems. Journal of Engineering Mechanics, ASCE, 123(12), 1219-1229, 1997.

19

Dr. Papadimitriou received his Diploma in Mechanical Engineering in 1984 from the University of Patras and his MSc and PhD degrees from California Institute of Technology (CalTech) in 1985 and 1990, respectively. He joined the department in 1999 as an Adjunct Professor and the faculty in 2000 as an Associate Professor. Before joining the Department, he served as faculty member at Texas A&M Univ. (1991-1994) and as visiting faculty at CalTech (1994-1995, 1996-1998). He also held research positions at Hong Kong University of Science and Technology (1995-1996) and at Jet Propulsion Laboratory-JPL (1996-1998).

ContactTel: +30-24210-74006, Fax: +30-24210-74012E-mail: [email protected], website : http://www.mie.uth.gr/Papadimitriou.html

Thanasis PapathanasiouAssociate ProfessorProcessing of Polymers and Composites


My interests revolve around the investigation of processing-structure-property relationships in heterogeneous materials. Processes of interest involve flow of heterogeneous mixtures into complex cavities or channels (injection molding, extrusion) or through fibrous media of complex internal structure (liquid molding, pultrusion). Central to our approach is the use of parallel computation to investigate the influence of microstructure on the details of the flow fields (processing-microstructure correlations) as well as on the details of concentration, thermal or stress fields (microstructure-property correlations). Our computations are carried out on very complex geometries, whose features are inspired by those of commercial composite materials using large-area automated microscopy. Quantification of these microstructures, whether obtained from digital micrographs or synthetically generated using algorithms such as RSA or Monte-Carlo, is carried out using nearest neighbor functions, variants of Ripley’s K-function as well as linear path functions.

Current projects include:

Micro-Scale Flows in Fibrous Media: We are interested in the computational investigation of flow patterns in fibrous media of complex internal structure, such as those encountered in liquid molding of high performance composites, and the determination of how such patterns are affected by the microstructural details of these media. Both Stokes’ and finite Reynolds-number flows are considered. An immediate objective is the development of quantitative models for the effective permeability of fibrous media as function of microstructural parameters. This involves differentiating between various hard-core arrays (currently lumped together under the heading "random") as well as identifying the exact point in microstructure evolution at which a fibrous medium's resistance to flow is significantly affected by clustering. A large part of this effort involves proposing and testing microstructural metrics that correlate with the observed trends in permeability. This research is currently funded by an EU IRG grant.

Transport across filled systems. We are using high performance computing based on the Boundary Element Method to investigate the manner in which the efficacy of filled systems is affected by their internal structure. Systems of interest include flake-filled membranes and particulate composites in which the particulate phase shows various degrees of aggregation. An example of heat transfer across a particulate system containing 10,000 individual particles, the aggregation state of which is determined by the parameters of the NVT-MC algorithm used in its generation, is shown in the attached figure, in which the temperature contours within a sub-section are shown in the insert. Concentration contours for diffusion across a material filled with impermeable flakes of random orientation are shown in the figure to the right.

Selected PublicationsChen, X. and Papathanasiou, T.D. Micro-Scale Modeling of Axial Flow through

Unidirectional Disordered Fiber Arrays. Composites Science and Technology, 67, 1286-1293, 2007.

Chen, X. and Papathanasiou, T.D. On the variability of the Kozeny constant for saturated flow across unidirectional, disordered, fiber arrays. Composites Part A: Manufacturing and Applied Science, 37(6), 836-846, 2006.

Bijeljic, B., Mantle, M.D., Sederman, A.J., Gladden, L.F. and Papathanasiou, T.D. Slow flow across macroscopically semi-circular fibre lattices and a free flow region of variable width - visualisation by magnetic resonance imaging. Chemical Engineering Science, 59(10), pp. 2089-2103, 2004.

Papathanasiou, T.D. and Guell, D.C. (Eds.), Flow-Induced Alignment in Composite Materials. ISBN 1 85573 254 8, Woodhead Publishing Ltd., Cambridge, UK, 1997.

Ingber, M.S. and Papathanasiou, T.D. A Parallel-Supercomputing Investigation of the Stiffness of Aligned, Short-Fiber-Reinforced Composites using the Boundary Element Method. Int. J. Numerical Methods in Engineering, 30, pp. 3477-3491, 1997.

20

Dr Papathanasiou received his Diploma in Chemical Engineering from NTUA in 1985, his MSc in Chemical Engineering from the University of Calgary (1987) and his PhD from McGill University (1991) in Canada. He joined the ME Faculty at Volos in 2008. Prior to this, he was Associate Professor of Chemical Engineering at the University of South Carolina, USA, Unilever Lecturer in Process Engineering at Imperial College, London, UK (1992-1997), Director’s Post-Doctoral Fellow at Los Alamos National Laboratory, USA (1991-1992) and Research Scientist at ALCAN Intl. R&D Center in Kingston, Canada. He received an European International Integration Grant in 2007.

ContactTel/Fax: +30-24210-74016/24210-74085E-mail: [email protected]

Nikos PelekasisAssociate ProfessorComputational Fluid Dynamics


Dynamics and stability of films and interfaces in stratified and dispersed flow. Bubble and drop dynamics in the presence of inertia, capillary and elastic forces. Biomechanics. Magnetohydrodynamic stability. Numerical Techniques, Finite Elements, Boundary Elements and Parallelization. Bifurcation Theory & Dynamical Systems.

Our present research projects focus on the following areas:

[1] Physiology of the motion and deformation of contrast agents subject to acoustic disturbances: HRAKLEITOS Funding Organization: Ministry of Education of Greece. Contrast agents are bubbles normally coated by a membrane in order to avoid clustering and to prevent gas dissolution. Upon application of ultrasound they exhibit strong scatter, which distinguishes them from tissue and allows for better flow visualization. Proper modelling of the membrane viscoelastic behaviour along with stability analysis and numerical simulations of their interaction with the external flow, allows for their characterization and optimal design for improved diagnostic and drug delivery modalities.

[2] Effect of rainfall on the flight characteristics of an airfoil: PENED Funding Organization: Greek Secretariat of Research and Technology. The dynamic development of liquid films due to shear from the surrounding boundary layer is investigated, as is the case for flow past a wing section under rainfall conditions. The theoretical and numerical study of such a flow field is intended to reveal the way interfacial and Tollmien-Schlichting waves grow in space and time for both linear and nonlinear disturbances and to capture their effect on boundary layer separation and transition.

[3] Stability analysis of magnetohydrodynamic flows: EURATOM Funding Organization: European Commission. A central issue in nuclear fusion is proper removal of the excessive amount of heat that is generated. Thus, the core of the reactor is surrounded by a mantle in which the refrigerating fluid is circulated. In this region, normally consisting of a liquid crystal melt, an interesting coupling between heat and momentum transfer takes place in the presence of the magnetic field that is generated in the core. The stability of different operation modes is very important for the optimal design of the reactor. 2d and 3d finite element analysis is undertaken in order to ascertain the connectivity of different solution branches in the parameter space defined by the Grashof and Hartmann numbers.

Selected PublicationsK. Tsiglifis & N. Pelekasis, Non-Linear Oscillations and Collapse of Elongated Bubbles

Subject to Weak Viscous Effects: Effect of Internal Overpressure. To appear in Physics of Fluids, 2007.

N. Pelekasis, Bifurcation Diagrams, Linear Stability Analysis and Dynamic Simulations of Free Convection in a Differentially Heated Cavity in the Presence of a Magnetic Field. Physics of Fluids, 18(3), pp. 1-23, 2006.

K. Tsiglifis & N. Pelekasis, Non-linear oscillation and collapse of elongated bubbles subject to weak viscous effects. Physics of Fluids, 17(10), pp. 1-18, 2005.

E. Lac, D. Barthes-Biesel, N. Pelekasis & J. Tsamopoulos, Spherical capsules in three-dimensional unbounded Stikes flows: effect of the membrane constitutive law and the onset of buckling. J. Fluid Mech., 516, pp. 303-334, 2004.

N. A. Pelekasis, J. A. Tsamopoulos, Linear stability of a gas boundary layer flowing past a thin liquid film that grows over a flat plate. J. Fluid Mech, 436, pp. 321-352, 2001.

21

Dr Pelekasis received his Diploma from NTUA in 1986 and his Ph.D. from the State University of New York at Buffalo (USA) in 1991. He joined the faculty at Volos in 2001. Before joining the Department he was affiliated with the Chemical Eng. Dept. of the Univ. of Patras (1997-2001) and the Levich Institute for Physicochemical Hydrodynamics in CCNY (1992-1994).

ContactTel: +30-24210-74102, Fax: +30-24210-74050E-mail: [email protected], website: http://www.mie.uth.gr/Pelekasis.html

Georgios PetropoulosAssistant Professor Machining Process Technology


Research interests Theory and Technology of Machining (conventional and unconventional) Processes, Machining of composite materials, Metrology, Tribology(surface characterization, modelling of lubricated contacts)

Research projects carried out in the Laboratory of Manufacturing Processes are:

Multi parameter analysis and typology of engineering surface textures.

Machinability of polymers and composites

Correlation of corrosion resistance and machining process

Models of hydrodynamic and elastohydrodynamic lubrication

Tribological behaviour of coatings

Selected PublicationsMarinkovic, A., Rosic, B. and Petropoulos, G. Analysis and optimization of

dynamically loaded porous metal sliding bearings under conditions of elastohydrodynamic lubrication. Engineering Computations, 24, pp. 255-268, 2007.

Petropoulos, G., C.N. Pandazaras, N.M. Vaxevanidis and A. Antoniadis, Multi-parameter identification and control of turned surface textures. ΙnternationalJournal of Advanced Manufacturing Technology, 29, pp. 118-128, 2006.

Hassiotis N.D. and G. P. Petropoulos, Influence of Surface Roughness on Corrosion Resistance of Surfaces of Turned Carbon Steel Parts. International Journal of Machining and Machinability of Materials, 1, pp. 202-212, 2006.

Petropoulos, G., Α. Τοrrance and C. Pandazaras ‘Abbott Curve Characteristics of Turned Surfaces. International Journal of Machine Tools and Manufacture, 43, pp. 237-243, 2003.

Pandazaras, C. and G. Petropoulos, A Computational Study of hydrodynamicallyLubricated Convex and Concave Journal Bearings. IMechE Journal of Engineering Tribology, 215, pp. 425-429, 2001.

22

Dr Petropoulos has received a B.Scin Physics and a Ph.D. in Mechanical Engineering from the Aristotle University of Thessaloniki, Greece. He joined the faculty in 1996 and currently is Director of the Manufacturing Processes Laboratory.

ContactTel: +30-24210-74064, Fax: +30-24210-74050E-mail: [email protected], website : http://www.mie.uth.gr/Petropoulos.html

Tassos StamatelosProfessor Internal Combustion Engines


Internal combustion engines. Automotive exhaust treatment systems: design optimization, control and diagnostics. Mathematical modeling of catalytic converters and diesel filters. Design and simulation of HVAC systems, solar energy systems, combined heat and power systems.

Industry- funded research projects carried out in the Lab include:

The Development and experimental validation of Computer Aided Engineering (CAE) tools to support exhaust after-treatment systems design and optimization, in the frame of a large envelope project aiming at the further development, customization and experimental validation of in-house CAE software transferred to industrial partners. System types addressed include Catalytic converters for SI engines, Diesel oxidation catalytic converters, Diesel particulate filters, operated with catalyst-doped fuel, (1D-3D), NOx adsorber catalysts for Gasoline Direct Injection and Diesel engines.

Pre-processing and post processing is customized for MS Excel interface or MATLAB Simulink environment. Code validation, experiment design and data acquisition, quality assurance of experimental data and model identification procedures are included. Innovative system versions that interfere with specialized patent literature are also developed and investigated.

Activities with public funding include the Study of combustion and emissions in a modern passenger car Diesel Engine with common rail fuel injection, fuelled by Biodiesel fuel blends, and the Transient modeling of the performance of building HVAC systems, conventional -vs- ground source heat pump - based.

Selected PublicationsKonstantas, G.S. and A.M. Stamatelos, Modeling Three-way Catalytic Converters: An

effort to predict the effect of Precious Metal Loading. Proc Instn Mech Engrs, Part D: J. Automobile Engineering, 221, pp. 355-373, 2007.

Pontikakis, G., A. Stamatelos, 3D Catalytic Regeneration Modeling of SiC Diesel Particulate Filters. ASME Transactions, J Eng for Gas Turbines & Power, 128 (2), pp. 421-433, 2006.

Stratakis, G.A. and A.M. Stamatelos, Flow Maldistribution Measurements in Wall-Flow Diesel Filters. Proc Instn Mech Engrs, Part D -J Automobile Eng, 218, pp. 995-1009, 2004.

Pontikakis, G.N., Konstantas, G.S. and A.M. Stamatelos, Three-Way Catalytic Converter Modelling as a Modern Engineering Design Tool. ASME Transactions, J Eng for Gas Turbines and Power, 126, pp. 906-923, 2004.

Stratakis, G.A. and A.M. Stamatelos, Thermogravimetric analysis of soot emitted by a modern engine run on catalyst-doped fuel. Combustion and Flame, 132, pp. 157-169, 2003.

23

Dr Stamatelos received his Diploma in 1984 and his Ph.D. in Mechanical Engineeringl in 1988 from Aristotle University of Thessaloniki. He joined the faculty at Volos in 1991.

ContactTel: +30-24210-74067, Fax: +30-24210-74096E-mail: [email protected], website: http://www.mie.uth.gr/Stamatelos.html

Tassos StamatisAssistant Professor Applied Thermodynamics – Thermal Power Stations


Thermodynamics, Heat Transfer and Gas Dynamics of Gas Turbine Engines, Modelling, Simulation and Diagnostics of Thermal Systems, methods of Diagnosis based on Artificial Intelligence, Integrated Diagnostic Systems in Energy installations, Parallel computers and algorithms. Currently, research is focused in Cogeneration and Trigeneration Systems, Optimization in Thermal Systems Design and Diagnostic Algorithms.

Selected PublicationsStamatis A , Mathioudakis K., The influence of heat transfer effects on turbine

performance characteristics. ASME paper, GT2006-91039, 2006.Mathioudakis K, Kamboukos Ph., Stamatis A., Gas turbine component fault detection

from a limited number of measurements. Proc. Instn Mech. Engrs, Part A: J. Power and Energy, 21, pp 609-618 2004). [PE Publishing Award for the best paper published in the journal in 2004.]

Aretakis N., Mathioudakis k., Stamatis A., Non-linear engine component fault diagnosis from a limited number of measurements using a combinatorial approach. ASME Journal of Engineering for Gas Turbine and Power, 125, pp. 642-650, July 2003, also ASME paper GT-2002-30031, 2003. [Best paper award, of the Controls and Diagnostics Committee of IGTI/ASME.]

Stamatis A., Kamboukos Ph., Aretakis N. Mathioudakis K., On board adaptive models: A general framework and implementation aspects. ASME paper, 2002-GT-300622, 2002.

Mathioudakis K., Stamatis A., Bonataki E., Diagnosing the sources of overall performance deterioration in CCGT Plants. ASME Journal of Engineering for Gas Turbines and Power, 124, pp. 256-263, 2002.

24

Dr Stamatis received his Diploma in 1982 and his Ph.D. in Mechanical Engineering in 1990 from National Technical University of Athens. He joined the faculty at Volos in 2004.

ContactTel: +30-24210-74077, Fax: +30-24210-74096, E-mail: [email protected], website : http://www.mie.uth.gr/Stamatis.html

Herricos StapountzisAssociate Professor Compressible Fluid Mechanics, Hydrodynamic Machines


Research interests include unsteady and turbulent flows, transition, shear flows, mixing and dispersion, vortex shedding, wind turbine and airplane aerodynamics, flow visualization, measuring techniques.

Representative research projects are as follows:

(1) Mechanisms of mixing in interfacial flows (2002-2004), Funding: GSRT-Bilateral cooperation Greece – Russia. Partner: Russian Academy of Sciences

(2) Development of CTV gear box for application on wind turbines (2003 - 2006). Funding: GSRT EPAN programme. Partners: DAVNET, Public Power Corporation, AUTH, GMC.

Selected PublicationsH. Stapountzis, D. Tsipas, A. Stamatellos, A comparative study of heat and mass

transfer by impinging jets. 8th European Turbulence Conference, Barchelona, 2000.

O.K. Rediniotis, H. Stapountzis, D.P. Telionis, Periodic vortex shedding over delta wings. AIAA Journal, 31, pp. 1555-1562, 1993.

H. Stapountzis, J. Westerweel, J.M. Bessem, A. Westendorp, F.T.M. Nieuwstadt, Measurement of product concentration of two parallel reactive jets using digital image processing. Journal of Applied Scientific Research, 49, pp. 245-249, 1992.

U. Karnik, H. Stapountzis, S. Tavoularis, Vortex shedding from bluff cylinders in strongly sheared turbulent flows. Journal of Wind Energy Ind. Aerod., 26, pp. 165-178, 1987.

H. Stapountzis, B.L. Sawford, J.C.R Hunt, R.E. Britter, Structure of the temperature field downwind of a line source in grid turbulence. Journal of Fluid Mechanics, 165, pp. 401-424, 1986.

25

Dr Stapountzis received his Diploma in Mechanical Engineering from NTUA in 1974 and his Ph.D. from Imperial College (University of London, UK, Aeronautics Department) in 1978. Before joining the Department in 2000 he served as faculty member in the Department of Mechanical Engineering at Auth for 15 years.

ContactTel : +30-24210-74003, Fax : +30-24210-74052 E-mail: [email protected], website : http://www.mie.uth.gr/Stapountzis.html

Panagiotis TsiakarasAssociate ProfessorCatalysis, Electrocatalysis & Fuel Cells


Professor Tsiakaras’ research is oriented toward solid state electrochemistry, fuelcells (Proton Exchange Membrane Fuel Cells & Solid Oxide Fuel Cells) engineering, design and development of catalysts and catalytic and electrocatalytic reactors, chemical & electrochemical promotion of catalysis.

More precisely, Prof. Tsiakaras focuses on the following topics:

Catalysis and electrocatalysis. Catalysts, reaction kinetics & reactors for: methane activation, (partial oxidation & catalytic combustion), gaseous pollutants oxidation/reduction, ethanol steam reforming, and water gas shift reaction. Electrochemical techniques for the study of catalytic reactions. Electrocatalyticoxidations of fuels (natural gas, alcohols ect). Catalyst Promotion: Electrochemical promotion of Catalysis (EPOC or NEMCA effect). Design, preparation and characterization of catalysts with non-uniform distribution of the catalytic activity. Study of strong metal-support interactions phenomena in catalysis (SMSI). Remote control promotion in catalysis.

Fuel cells engineering. Design, preparation, characterization and testing of anodes and cathodes (for low and high temperature fuel cells – pemfc & sofc). Direct alcohol fuel cells. Study of alcohols’ crossover phenomena trhough the PEMFC. Modeling.

Solid State Electrochemistry. Design, preparation, characterization and testing of novel electrolytic and electrodic materials for: a) low and intermediate solid oxide fuel cells, b) electrolyzers. Study of the type of conductivity (ionic and/or electronic) co-ionic and mixed conductors.


[1] Ethanol combustion in a Solid Oxide Fuel Cell for electrical power generation aided study. Funding: INTAS Program in collaboration with Russia-Ukrane-Italy.

[2] Design, analysis and manufacturing of PEM Fuel Cells for the direct conversion of alcohols at low temperature. Funding GSRT - Joint research program in collaboration with China.

[3] National project PENED, funded from Research and Development Ministry, "Design, Development & Characterization of new electrocatalytic materials for low temperature Direct Ethanol PEM Fuels Cells".

[4] National project PYTHAGORAS, funded from Education Ministry, "Direct ethanol PEM Fuel Cell and transport phenomena simulation".

Selected PublicationsP. Tsiakaras, PtM/C (M = Sn, Ru, Pd, W) based anode direct ethanol–PEMFCs:

Structural characteristics and cell performance. Journal of Power Sources, in press 2007.

S. Kontou, V. Stergiopoulos, S. Song and P. Tsiakaras, Ethanol/water mixture permeation through a Nafion® based membrane electrode assembly. Journal of Power Sources, in press 2007.

S. Song, V. Maragou and P. Tsiakaras, Recent Advances in Direct Alcohol PEMFCs. Fuel Cell Technology & Applications, ASME Transactions, 4 , pp. 203-210, 2007.

S. Song and P. Tsiakaras, Recent progress in direct ethanol proton exchange membrane fuel cells (DE- PEMFCs). Applied Catalysis B., 63, pp. 187-193, 2006.

G. Andreadis and P. Tsiakaras, Ethanol Crossover and Direct Ethanol PEM Fuel Cell Performance Modelling and Experimental Validation. Chemical Engineering Science, 61, pp. 7497-7508, 2006.

26

Dr Tsiakaras received his received his diploma in Industrial Chemistry from the University of Messina (Italy). In 1987 he obtained his specialization (MSc) in chemistry and technology of catalysis from the University of Messina and in 1992 he received his PhD from the University of Patras. Before joining the Department in 1995, he has worked as a researcher in Greece and abroad.

ContactTel: +30-24210-74065, Fax: +30-24210-74050E-mail: [email protected] , website : http://www.mie.uth.gr/Tsiakaras.html

Dimitris ValougeorgisAssociate Professor Analytical and Computational Mesoscale Methods in Transport Phenomena


Basic research interests include non-equilibrium flow and transport phenomena, kinetic theory, rarefied gas dynamics, numerical solution of integro-differential equations (Boltzmann and kinetic model equations), lattice Boltzmann methods, kinetic numerical approaches in CFD and magnetohydrodynamics. Based on the above applied research is performed in the fields of nano- and micro-electro-mechanical systems and devices, in vacuum technology including vacuum systems of fusion reactors and in high altitude aerodynamics.

Recent research projects focus on the following areas:

(1) Greek National Program for Controlled Thermonuclear Fusion (Association Euratom – Hellenic Republic) funded by EURATOM (EU) and the Greek Secretariat of Research and Technology (2000 - …).

Kinetic solvers based on model equations for simulating the vacuum systems of fusion reactors in the whole range of the Knudsen number are implemented. Also, lattice BGK kinetic algorithms for simulation of MHD flows and plasma turbulence are developed.

(2) Flows and transport phenomena of binary gas mixtures in nano and micro electromechanical devices, funded by the Ministry of Education (program PYTHAGORAS, 2005-2006).

Flows and transport phenomena of binary gas mixtures in NEMS and MEMS in the whole range of the Knudsen number are studied. Non-equilibrium gas flows are solved through channels of various cross sections due to pressure, temperature and concentration gradients. Several transport phenomena, which appear as we depart from the continuum limit, such as thermal creep and barodiffusion, are investigated. The work is extended to boundary driven flows such as flows in micro-cavities and periodically grooved channels. The velocity slip coefficients of several gas mixtures are estimated via kinetic theory.

(3) The Lattice Boltzmann Method in Computational Fluid Dynamics, funded by the Ministry of Education (program HRAKLEITOS, 2004-2006)

A new LBM scheme based on the Shakhov (instead of the BGK) kinetic model to resolve certain constraints of the classical LBM including its extension to non-isothermal flows is developed. Benchmarking of the new approach by solving certain prototype problems including the Orsang-Tang vortex problem is performed. Finally, MHD flows are simulated based on LB schemes.

Selected PublicationsVaroutis, S., Sazhin, O., Valougeorgis, D., Sharipov, F., Rarefied gas flow through

short tubes into vacuum. J. Vacuum Sci. & Tech. – A, 26, 228-238, 2008.Naris, S., Valougeorgis, D., Rarefied gas flow in a triangular duct based on a

boundary fitted lattice. Europ. J. Mech. B/Fluids, 27, 810-822, 2008.Naris, S., Valougeorgis, Boundary driven non-equilibrium gas flow in a grooved

channel via kinetic theory. Phys. Fluids, 19, 067103.1-067103.15, 2007. Breyiannis, G., Valougeorgis, D., Lattice kinetic simulations in 3D MHD turbulence.

Computer & Fluids, 32, 920-925, 2006.Siewert, C. E., Valougeorgis, D., Concise and accurate solutions to half-space binary-

gas flow problems defined by the McCormack model and specular-diffuse wall conditions, Europ. J. Mech. B/Fluids, 23, 709-726, 2004.

27

Dr Valougeorgis received his diploma from AUTh in 1980 and his M.Sc and Ph.D. from the Virginia Polytechnic Institute and State University (VPI&SU, USA), in 1982 and 1985 respectively. During the next two years (1985-87), he was a visiting assistant professor at the Dept. of Mathematics and the Center for Transport Theory and Mathematical Physics of VPI&SU. He joined the faculty of the University of Thessaly (UTh) in 1998. Before joining UTh, he worked in Hellenic Petroleum in the Industrial Complex of Thessalonikifor almost 10 years.

ContactTel: +30-24210-74058, Fax: +30-24210-74059E-mail: [email protected], website: http://www.mie.uth.gr/Valougeorgis.html

Nicholas S. VlachosProfessor Fluid Mechanics, Pumps & Turbomachines


Research interests include: Thermo-fluids of energy and propulsion systems. Environmental flows and pollution dispersion. Magnetohydrodynamics. Jet flows and turbulence. Wind turbine aerodynamics and Aeroelasticity, Computational fluid dynamics and laser diagnostics for chemically reacting multiphase flows. Blood flow.


(1) Greek National Program for Controlled Thermo-nuclear Fusion (1999-date)Funding: EURATOM/Greek Secretariat of Res. & Tech. Partners: Nat.Tech. U. Athens, Demokritos, U. Athens, Thessaloniki, Ioannina, Thrace & Cyprus, Tech. U. Crete.

Development of computational fluid dynamics and heat transfer models for the study of magnetohydrodynamic flow and stability. Emphasis is given to the modeling of natural convection MHD flows and flow in toroidal geometries of JET and ITER type machines. Faculty: N. Vlachos (coord.), D. Valougeorgis, N. Pelekasis.

(2) Development of CFD code for aeroelasticity of wind turbine blades (2000-date) Past Funding: Centre for Renewable Energy Sources. Partners: CRES, NTUA.

Development of a reliable CFD model coupled with an elasticity model to study the aeroelastic behaviour of wind turbine blades under conditions of stall.

(3) Modeling of calciner for cement production (1999-date)

Past Funding: Greek Secretariat of R&T (96SYN121). Partners: AGET Hercules.

The main objective of the project is to develop CFD models for the study of coal combustion and calcination for cement production.

(4) Blood flow modeling and measurements (2004-date)

Funding: Lab of Fluid Mechanics & Turbomachines. Partners: NTUA, “Erricos Dunant” Hospital.

The main objective of the project is to develop CFD models and Laser diagnostics for the study of physiological fluids such as blood.

Selected PublicationsFidaros, D.K., C.A. Baxevanou, C. Dritselis and N.S. Vlachos, Numerical modelling of

flow and transport processes in a calciner for cement production. Powder Technology, 171, pp. 81-95, 2007.

Politis, A.K., G.P. Stavropoulos, M.N. Christolis, F.G. Panagopoulos, N.S. Vlachos and N.C. Markatos, Numerical modeling of simulated blood flow in idealized composite arterial coronary grafts: Steady state simulations. J. Biomechanics, 40(5), pp. 1125-1136, 2007.

Sarris, I.E., G.K. Zikos, A.P. Grecos and N.S. Vlachos, On the limits of validity of the low-magnetic Reynolds number approximation in MHD natural convection heat transfer. J. Numerical Heat Transfer B, 50(2), pp. 157-180, 2006.

Sarris, I.E., S.C. Kakarantzas, A.P. Grecos and N.S. Vlachos, MHD natural convection in a laterally and volumetrically heated square cavity. Int. J. Heat Mass Transfer, 48, pp. 3443-3453, 2005.

Baxevanou, C. and N.S. Vlachos, A comparative study of numerical schemes and turbulence models for wind turbine aerodynamics modelling. Wind Engineering, 28(3), pp. 275-290, 2004.

28

Dr Vlachos received his degrees in M-E Eng. from NTU Athens (1967), ΜSc in Thermal Power (1972) and PhD in Fluids Engng. (1977) from Imperial College, Univ. London. He worked in England, France and USA (1970-91) specializing in LDA and CFD. He developed flow models for NASA’s space shuttle & USDoE’sflue gas desulphurization programs. He is the first elected faculty (1992) of the Engng. School. He was acting chairman (‘92-98) of the Department chairman of UTH Lib Com. (‘94-99), member of Exec.Comm. of the Univ. of Aegean (‘93-95) and UTH (‘94-98), president of ΕΒΕΤΑΜ (‘94-98) and founder of Thessaly Tech Park. Dr Vlachos is director of the Fluid Mechanics & Turbomachines Lab and scientific responsible for the UTH Fusion Program (Association Euratom - Hellenic Republic).

ContactTel: +30-24210-74094, Fax: +30-24210-74085E-mail: [email protected], website : http://www.mie.uth.gr/labs/fluids

Athanasios ZiliaskopoulosProfessor Optimization of Production/Transportation Systems


Research interests include Network Equilibrium and Optimization Models (Dynamic and Stochastic, Optimum Path Algorithms (Online, Time Dependent and Stochastic), Information Technology, Control Systems (Reactive and Anticipatory), Logistics, Real-Time Traffic Management, and Freight Routing and Logistics.

Representative current research projects are :

[1] Partnership To Promote Efficient Freight Flow Movements In The Chicago Area -Partnership for Innovation (2001-2004) (with John Birge and Jay Franke). Funding: National Science Foundation.

[2] A Zero Public Infrastructure Vehicle Based Traffic Information System (Oct. 2001-Sept. 2002) Continuation 3 years (Oct. 2002-Sep. 2005). Funding: National Science Foundation.

[3] Evaluation of Regional Deployment of Transit Signal Preemption (2001-2003). Funding: Regional Transportation Authority.

[4] Development of Simulation/Assignment Priority Corridor Management Approaches (2001-2003). Funding: New Jersey DOT.

[5] Online Optimization and Control of Real-Time Systems (1998 –2003). Funding: National Science Foundation, CAREER Award.

[6] Marketing, Policy and Pricing Services for the Panama Canal (1998-2001) (with Leon Moses, Economics Dep. and Arthur Andersen LLP), Funding: by the Panama Canal Commission.

Selected PublicationsWaller, S.T., and Ziliaskopoulos A.K., A combinatorial user optimal Dynamic Traffic

Assignment algorithm. Annals of Operation Research, 144, pp. 249-261, 2006.Waller, S.T., Mouskos, K.C., Kamaryiannis, D., and Ziliaskopoulos A.K., A linear

model for the continuous network design problem. Computer-aided Civil and Infrastructure Engineering, 21, pp 334-345, 2006.

Peeta, S. and A. Ziliaskopoulos, Fundamentals of Dynamic Traffic Assignment: the Past, the Present and the Future. Networks and Spatial Economics, 1-2, pp 201-230, 2002.

Li, I.Y., A.K. Ziliaskopoulos, and D. Boyce, A combined model for time-dependent Trip distribution and traffic assignment. Journal of the Transportation Research Board, 1783, pp. 98-110, 2002.

Chang, E., A.K. Ziliaskopoulos and D. Boyce, A Solution Algorithm for the Combined Interregional Commodity Flow and transportation Network Model with Link Capacity Constraints. Transportation Research Record - Journal of the Transportation Research Board, 1771, pp 114-124, 2001.

29

Dr Ziliaskopoulos received his Diploma in Chemical Engineering from AUTh in 1984 and his MS in 1991 and PhD in 1994 from the Department of Civil Engineering of University of Texas at Austin. Prior to joining the M&ID in 2003, he was Associate Professor of Civil Engineering at the Northwestern University, USA,

ContactTel: +30 24210 74015, Fax: +30-24210-74050E-mail: [email protected], website: http://www.mie.uth.gr/Ziliaskopoulos.html

Contact informationGraduate Program Secretariat

Department of Mechanical Engineering, University of Thessaly

Athens Avenue, Pedion Areos, 383 34 Volos, Greece

Tel.: +30-24210-74085 or 74054, Fax: +30-24210-74050

email: [email protected]

website: http://www.uth.gr

3

MINISTRY OF NATIONAL EDUCATION &

RELIGIOUS AFFAIRS

MANAGING AUTHORITY OF OPERATIONAL PROGRAM OF

EDUCATION AND INITIAL VOCATIONAL TRAINING

EUROPEAN COMMUNITYCo-financing

EUROPEAN SOCIAL FUND

Date post:	22-Jun-2020
Category:	Documents
Upload:	others
View:	1 times
Download:	0 times

DEPARTMENT OF MECHANICAL ENGINEERINGEquipment: Horizontal and vertical 25 mm i.d. pipelines for...

Documents