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© 2013 ANSYS, Inc. October 7, 2013 1
ANSYS Release 15.0 Structural Mechanics Highlights
ANSYS Inc.
CADFEM (AG) Suisse
© 2013 ANSYS, Inc. October 7, 2013 2
Motivation for Mesh Assemblies
Geometry is not anymore the starting point of a Workbench based structural simulation.
Multiple finite element models can be assembled and leverage all Mechanical functionalities, including contact detection.
© 2013 ANSYS, Inc. October 7, 2013 3
15.0 Serial Improvements
(4 CPU)
Parallel part by part meshing
(1 CPU)
© 2013 ANSYS, Inc. October 7, 2013 4
© 2013 ANSYS, Inc. October 7, 2013 5
Bolt Thread modeling without meshing the thread provides faster solutions while retaining a good level of accuracy.
True Thread Simulation Bolt Section Method
10 times faster! Wall Time Elements
True Thread Model 115 hrs 1.1 M
Bolt Section Method 12.75 hrs 69K
3D threaded model
3D Unthreaded model
3D threaded Bolt & contact status
3D Unthreaded Bolt & contact status
Bolt-Thread Modeling example:
© 2013 ANSYS, Inc. October 7, 2013 6
Mesh adaptivity example: 3D rubber sealing
To refine the mesh so that the gap can be filled
© 2013 ANSYS, Inc. October 7, 2013 7
And much more...
• Many new other improvements: • New CATIA V6 interface
• Defined shortcuts for common functions
• Worksheet summarizing the results
• Named selection based on elements number
• …
© 2013 ANSYS, Inc. October 7, 2013 8
ANSYS Fluid Dynamics Release 14.5 Overview
Sadek CHERHABILI
ANSYS France
ANSYS Conference & 10ème Forum CADFEM Lausanne, 11 Septembre 2013
© 2013 ANSYS, Inc. October 7, 2013 9
This presentation is an overview of the major improvements in ANSYS Fluid Dynamics at release 14.5
This presentation does not include
– Meshing technologies updates
– ANSYS Icepak updates
– ANSYS Polyflow updates
After the official release, please go to the ANSYS Customer Portal for the complete release 14.5 update
– New capabilities
– Release notes
– Migration manual
Important Note
© 2013 ANSYS, Inc. October 7, 2013 10
•Always better usability
•Integrated advanced meshing solutions
•Shape optimization innovations
•Better, faster, more robust simulations
•Advanced physics for specialized applications
•Turbo-Machinery specific solutions
•Internal combustion engines specific solutions
•Extended Multiphysics capabilities
ANSYS Fluid – Release 14.5 Highlights
© 2013 ANSYS, Inc. October 7, 2013 11
Key Benefits
When using TGrid, reduce the data transfer bottleneck thanks to TGrid’s meshing capabilities integrated into Fluent
– Import CAD directly into Fluent Meshing
– All TGrid and Fluent functionalities
– Serial meshing in parallel session Fluent
Target Applications
Current users of ANSYS TGrid
Very large meshes
Integrated Meshing in Fluent Environment
New Fluent (with TGrid meshing) component available in ‘Component Systems’ and added in ‘Project Schematic’
User interface of the Fluent Meshing Mode. (Displayed model depicts human stomach imported directly into Fluent in STL format).
Integrated Meshing (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 12
ICEM CFD is now available in Workbench!
You can connect it and use it as ANSYS Meshing
Geometrical and meshing parameters are fully supported
14.5 ICEM CFD Workbench Integration
Better User-Experience (ICEM CFD)
© 2013 ANSYS, Inc. October 7, 2013 13
Use monitors to determine a solution convergence (replacing or complementing the residuals convergence criteria)
Define Your Own Convergence Criteria
Better User-Experience (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 14
Faster process to create for ‘Quick Animations’
Improved file load speed for transient analysis
Supports changing geometry topology for post-processing of cases with moving/deforming walls (Particularly useful for IC engine simulations)
Post-processing of transient statistics from Transient Blade Rows simulations
Better Post-Processing With CFD-Post
Always Better Usability (CFD-Post)
© 2013 ANSYS, Inc. October 7, 2013 15
Use Fluent as a Server
Manage, control and steer remote Fluent sessions from Simplorer, Mathlab, Python, etc.
FLUENT Remote Console
00
0
VOC
Rseries
Ccapacity IBatt
CT_S CT_L
RT_S RT_L
RLoad
I2 R5
EQU
FML1
0.00 2000.00 4000.00 6000.00 8000.00 10000.00 12000.00 14000.00Time [s]
3.00
3.20
3.40
3.60
3.80
4.00
4.20
RL
oa
d.V
[V
]
Curve Info
RLoad.VTR
Discharging a battery circuit SIMPLORER / FLUENT co-simulation
0.00 2500.00 5000.00 7500.00 10000.00 12500.00 15000.00Time [s]
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
I2.I [A
]
Ansoft LLC Simplorer_pulse_discharge_320mAXY Plot 1 ANSOFT
Curve Info
I2.ITR
Better User-Experience (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 16
Better Shape Optimization Capabilities
Better usability of the Mesh Morpher and Optimizer
⁻ Better controls for constraining the deformation to certain regions
⁻ Drive the Mesh Morpher and Optimizer (MMO) parameters from WB/DX
Better usability of the Adjoint Solver – Understand how select system inputs and
the geometry impact lift, drag, pressure drop from a single simulation
– Large case robustness (up to 300 million cells)
– Compound observables
– Adjoint specific post-processing
Mesh morpher and optimizer Target: uniform velocity at outlet
Before
After
Optimization (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 17
Always Faster HPC Solutions
Continued scalability improvements
⁻ Esp. MPIs, DPM, Custom Field Functions
⁻ Interpolation file speed
⁻ Case file I/O speed-up
Progress in GPU technology
⁻ Support for UDFs, ray tracing , view factors
⁻ AMG linear solver on GPU (Beta)
F1 (140M cells) Case IO in seconds
#Proc Baseline Optimized
16 1413 1251
48 1115 948
96 1046 883
192 1266 1066
AMG Total
SP 352 558 74 4.76x 289 1.93x
DP 485 777 97 5.00x 417 1.86x
SP 71 100 86 0.83x 114 0.88x
DP 132 179 119 1.11x 166 1.08x
AMG Total
SP 1983 3168 394 5.03x 1582 2.00x
DP 2832 4593 517 5.48x 2263 2.03x
SP 496 653 454 1.09x 611 1.07x
DP 933 1221 630 1.48x 920 1.33x
CPU Intel(R) Xeon(R) CPU X5650 @ 2.67GHz, Westmere-EP, Dual hex-core
GPU Quadro 6000
FLUENT F-cycle, group size 8, smoother weight 0.9
NVAMG V-cycle, group size 8, smoother weight 0.9, determinism_flag=0
Serial
T12
Internal Flow Steady Computation
Internal Flow Unsteady Computation
Fluent NVAMG
AMG Total
Serial
T12
Fluent
AMG Total
NVAMG
High Performance Computing
© 2013 ANSYS, Inc. October 7, 2013 18
Improvements in Numerics
Continued work on improving robustness and efficiency
Improved accuracy for deforming meshes via 2nd order time discretization
Non-Reflecting Boundary Condition for the Pressure-Based Solver - Compatible with species transport and combustion models
Node-based gradients on polyhedral meshes for accuracy on mixed meshes
With non-reflecting boundary conditions
Without non-reflecting boundary conditions
Numerics (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 19
New Physical Modeling Capabilities
Combustion
₋ Faster chemistry
₋ Super-equilibrium species (CO, NOx, …)
Radiation and Heat Transfer
₋ S2S and viewfactor speed-up
₋ Periodics with ray tracing
Turbulence and Acoustics: Focused development and R&D
₋ Transition, hybrid LES-RANS, WMLES
₋ Post-process acoustics data generated by 3rd parties with Fluent Ffowcs Williams-Hawkings acoustics solver
Physical Modeling (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 20
New Multiphase Modeling Capabilities
Discrete particles modeling ₋ DPM accuracy, robustness and post-
processing improvements, including DEM
Eulerian Multiphase improvements ₋ Degassing boundary condition
₋ Boiling and gas-liquid enhancements
Eulerian Wall Film modeling extensions ₋ Adaptive time stepping
₋ Coupling with Mixture and Eulerian Multiphase models, including thermal
₋ Condensation-Vaporization of wall films
Free surface modeling extensions ₋ Maragoni effects via surface tension ext.
₋ Complete range of wave regimes in 14.5
₋ Multiple super-imposed waves
₋ Compressible liquids
Physical Modeling (Fluent)
© 2013 ANSYS, Inc. October 7, 2013 21
Continuation of innovation in the area of Transient Blade Row Models
– Additional Models: Time Transformation with (equilibrium) wet steam
– Profile visualization and rendering – Availability of transient statistics
Improvements in usability and capabilities in BladeModeler
– Design Comparison in BladeModeler – Camberline Theta mode with beta end angle
definition in BladeModeler
Use the native Vista CPD (Centrifugal Pump Design) native Worbench application for easier setup an and faster simulation process
Additional Transient Blade Row Models
Profile Visualization
Advanced Blade Row (CFX)
© 2013 ANSYS, Inc. October 7, 2013 22
Ability to perform blade flutter analysis with periodic displacement mesh motion boundary condition
Blade flutter can be applied to full wheel or you can use Fourier Transformation for reduced model size and hardware resources
Transient Blade Row – Blade Flutter
Advanced Blade Row (CFX)
© 2013 ANSYS, Inc. October 7, 2013 23
Workbench IC Engine System: Port-flow Simulation Support
WB IC Engine System Application
Now supported on Linux
Port-flow simulation support
– Automatic preparation of geometry for port flow analysis
– Automatic meshing
Improved solver & reporting
– Automatic solver setup from the best practices for cutcell and Hybrid meshing
– Automatic default swirl plane creation
– Default custom field functions for swirl with an ability to modify the definition
Input Manager for Port Flow
Final geometry with Inlet and Outlet Plenums, and port deactivated
Original Geometry
© 2013 ANSYS, Inc. October 7, 2013 24
One-way thermal coupling of Fluent and Mechanical via Systems Coupling via external data coupling
– External data can accept heat flow, temperature, near wall temperature and heat transfer coefficient data via an AXDT file
– AXDT file can be from the following sources: ANSYS Mechanical, ANSYS CFD-Post, Third party solvers, spreadsheets, etc.
One and two-way coupling between Fluent and Maxwell and HFSS
– Exterior surfaces and volumes
Key New Multiphysics Workflow Enabled
Multiphysics Capabilities
Maxwell Time Averaged Loss
Temperature
Energy Source
Fluent Temperature
© 2013 ANSYS, Inc. October 7, 2013 25
Stabilization (“compressibility correction”) for 2-way FSI with systems coupling
– Improves the robustness for 2-way FSI simulations involving compressible flows
– Can be enabled for each dynamic zone
More Robust 2-way Fluid/Structure Interaction
Image courtesy of Tetra Pak
Multiphysics Capabilities