Computer Aided Thermal Computer Aided Thermal Fluid AnalysisFluid Analysis
Lecture 6Lecture 6
Dr. Ming-Jyh ChernDr. Ming-Jyh Chern
ME NTUSTME NTUST
Road Map for TodayRoad Map for Today
• Importing mesh data from other Importing mesh data from other systemssystems
• Exporting mesh data Exporting mesh data
• Mesh structureMesh structure
• Mesh operationMesh operation
• User Guide Chapter 4User Guide Chapter 4
Importing Mesh Data from Importing Mesh Data from Other SystemOther System• STAR-CD can use mesh files generated by other CADSTAR-CD can use mesh files generated by other CAD
/CAE softwares./CAE softwares.• Acceptable CAD/CAE files:Acceptable CAD/CAE files:
– SAMMSAMM– ICEM CFDICEM CFD– IDEASIDEAS– ANSYSANSYS– PATRANPATRAN– NASTRANNASTRAN– PLOT3D PLOT3D
How to import mesh files in How to import mesh files in STAR-CDSTAR-CD• Using the “Import GriUsing the “Import Gri
ds” STAR GUIde paneds” STAR GUIde panel.l.
• Surface data are impoSurface data are imported using the “Imporrted using the “Import CAD/Surface Informat CAD/Surface Information”tion”
Exporting Mesh DataExporting Mesh Data
• Prostar can export mesh data to other CAD/CProstar can export mesh data to other CAD/CAE.AE.
• Types of Prostar provides:Types of Prostar provides:– ANSYSANSYS– PATRANPATRAN– NASTRANNASTRAN– IDEASIDEAS– ENSIGHTENSIGHT– FIELDVIEWFIELDVIEW
How to export mesh data in PrHow to export mesh data in Prostarostar• Using the “Export Grids” STAR GUIde Using the “Export Grids” STAR GUIde
panel.panel.
Mesh ConnectivitiesMesh Connectivities
• When we use multi-When we use multi-block method to block method to construct mesh, there construct mesh, there are connection are connection problems appearing problems appearing between blocks.between blocks.
• Regular connectivityRegular connectivity• Integral connectivityIntegral connectivity• Arbitrary connectivityArbitrary connectivity
Regular ConnectivityRegular Connectivity
• Discontinuities Discontinuities must be removed must be removed by merging by merging coincident vertices coincident vertices at the interfaces at the interfaces between adjacent between adjacent blocks.blocks.
• One-to-one One-to-one connection.connection.
Couple GenerationCouple Generation
• Tools>Couple ToolTools>Couple Tool
• Manually - only to Manually - only to integral couplesintegral couples
• Automatically – to Automatically – to integral matching integral matching or arbitrary or arbitrary matchingmatching
Manual CouplingManual Coupling
Automatic CouplingAutomatic Coupling
Usage of COUPLE SETUsage of COUPLE SET
• Integral or ArbitraryIntegral or Arbitrary
Couple - IntegralCouple - Integral
Couple - IntegralCouple - Integral
Couple - IntegralCouple - Integral
Integral ConnectivityIntegral Connectivity
Couple-ArbitraryCouple-Arbitrary
Couple-ArbitraryCouple-Arbitrary
Couple-ArbitraryCouple-Arbitrary
Arbitrary connectivityArbitrary connectivity
Arbitrary connectivityArbitrary connectivity
Arbitrary connectivityArbitrary connectivity
Arbitrary connectivityArbitrary connectivity
Homework 3 Homework 3
• Purpose: Practice the usages of block and couple.Purpose: Practice the usages of block and couple.• Design a 3-D irregular block and mesh the block. Design a 3-D irregular block and mesh the block.
An orthogonaliser must be used for the block.An orthogonaliser must be used for the block.• Design a case which includes two cylindrical blocDesign a case which includes two cylindrical bloc
ks to use integral couple.ks to use integral couple.• Design a case, which includes two cylindrical blocDesign a case, which includes two cylindrical bloc
ks perpendicular to each other, to use arbitrary cks perpendicular to each other, to use arbitrary couple.ouple.
• Due date: 24 April, 2006.Due date: 24 April, 2006.
Mesh and Geometry Mesh and Geometry CheckingChecking
Macroscopic CheckingMacroscopic Checking