Table of Contents

• 1.1. How do I create a prism mesh?
  
• 1.2. What is the use of Growth law?
  
• 1.3. How do I ensure that there is a smooth volume transition from prism to tetras?
  
• 1.4. How do I calculate first cell height for my prism mesh?
  
• 1.5. Why I am getting stuck elements/Tetras after prism run and how do I get rid of them?
  
• 1.6. What are all parameters which can be set for prism mesher, as an expert?
  
• 1.7. How is aspect ratio for Prism defined?
  
• 1.8. What is the best way to use smoothing to get a good quality prism mesh?
  
• 1.9. I would like to vary my prism height (boundary layer) based on the size of the surface triangles. How do I do that?
  
• 1.10. How is the Aspect ratio of a Pyramid calculated?
  

• 2.1. How do I create a tetra mesh?
  
• 2.2. I run tetra and I do not see any mesh on all/some surfaces?
  
• 2.3. I run Tetra - From CAD/Surface mesh and I have leakage.
  
• 2.4. I run tetra, but my volume assignment seems wrong.
  
• 2.5. I run tetra, but my mesh looks too coarse/fine.
  
• 2.6. I run tetra, but I get Orientation Errors.
  
• 2.7. I run Tetra-From CAD/Surface Mesh and I have leakage, but cannot close the holes.
  
• 2.8. Why do I need curves/points for tetra meshing?
  
• 2.9. Why does my mesh jump from one surface to another?
  
• 2.10. How do I define periodicity?
  
• 2.11. How do I create squeezed/stretched tetras to resolve my boundary layer?
  
• 2.12. How do I run tetra from command-line?
  
• 2.13. Why does my tetra crashes with "suspect value in AddVertexToSet" message?
  
• 2.14. How do I ensure a closed volume for Tetra?
  
• 2.15. How do I define mesh sizes for tetra?
  
• 2.16. What is a Material point?
  
• 2.17. How many licenses tetra would consume on a multi-processor machine?
  
• 2.18. Why do I get error message "could not find opposite point in triangulate" while generating tetra mesh?
  
• 2.19. Why do I get the error "possible error in trim curve for surface" while tetra mesh generation?
  
• 2.20. What is edge-criterion , how does it effect the tetra mesh?
  
• 2.21. How do I insert a closed surface mesh into an existing volume mesh and get rid of trapped tetras?
  
• 2.22. My tetra run reports for the leakage, I do see the line but there is no single/multiple edges! What is happening?
  
• 2.23. How is the expansion ratio for linear progression calculated? (given number of layers, total height and initial height)
  
• 2.24. What is "unhandled case in fix spike node...."?
  
• 2.25. What are stuck elements appearing in my subset?
  

• 3.1. How do I remove negative volumes?
  
• 3.2. What are different diagnostics for a tetra/prism/pyramid mesh?
  
• 3.3. How do I define periodicity?
  
• 3.4. How do I define an internal/thin wall?
  
• 3.5. How do I input "tolerance" to do copy/mirror/merge of meshes?
  
• 3.6. There are so many options to do smoothing on structured meshes. Could you explain these?
  
• 3.7. Why can't ICEM CFD read my tetin files?
  
• 3.8. Why can't I import the Ansys mesh into Mesh Editor?
  
• 3.9. Why do I get error message for the IGES->tetin translation where IGES file is written from CATIA?
  
• 3.10. When I try to convert linear to quadratic tets, why do I get the message like "Angle check failed for node XXXXX, Midpoint XXXXX linearized"?
  
• 3.11. Why can't I import a PATRAN grid as a "geometry" into MED while the same can be imported as a "mesh" there?
  
• 3.12. What is "make Consistent"?
  
• 3.13. Why does my element numbering in MED look different than in my solver.
  
• 3.14. Why I cannot switch off surfaces sometimes?
  
• 3.15. In my surface mesh, I found feather edge (bad surface (triangle) mesh, especially in the complicated geometry, the quality of surface mesh is not good. The cell equiangle skew is larger than required. The relative low quality might lead to unstable or divergency in calculation. What's the remedy then?
  
• 3.16. Some of the CAD->Tetin translators in "Import Geo" require the CAD system installation. Which ones are those?
  
• 3.17. How do I work through Y+ adjustment tool? Can you tell me step by step?
  
• 3.18. How do I stretch or shrink geometry in specific directions?
  
• 3.19. How to read INPUT file with named entity data in ICEM?
  
• 3.20. Why do I get error message "med.exe has generated errors and will be closed by windows",while trying to smooth mesh to desired quality in mesh editor?How do I get rid of this?
  
• 3.21. I have several geometry files in a directory. I wish that ICEM CFD should take them all one by one, run HEXA using a replay file, save mesh and write output for solver for all of them. Can I do that?
  
• 3.22. How do I read a point data file in MED so that I get the points, curves, surfaces automatically?
  
• 3.23. While doing smoothing, MED crashes with "Assertion failed: triangle_sizes[i] >= 0.0, file ucurve.C, line 2196 Signal 6 caught!". What is wrong here?
  
• 3.24. Does ICEM have the ability to create a Voronoi Mesh?
  
• 3.25. How is the expansion ratio for linear progression calculated? (given number of layers, total height and initial height)
  
• 3.26. Why does my tetin file take too long to load?
  
• 3.28. How do I extrude mesh by using a function for spacing?
  
• 3.31. Why can't I merge nodes near a quad-ring
  
• 3.32. When I try to change the curve mesh size, why do I get the following error: "Warning: Using automatic sizing;...using xxxx for global mesh size"?
  

• 4.1. I get negative volumes when I load the mesh in the solver
  
• 4.2. How do I define periodicity?
  
• 4.3. How do I run hexa in batch from command line?
  
• 4.4. Why can't I merge two faces even though they share the same material?
  
• 4.5. Why does my mesh project to the wrong surface?
  
• 4.6. Why does my edge go to the wrong location even though I projected it to a right curve?
  
• 4.7. Why doesn't my mesh go to true B-spline surface? I do not want to use the approximation of tri-tolerance!
  
• 4.8. Why does the O-grid get created outside the blocks?
  
• 4.9. I have a Plot3D mesh. I want to modify it, I have the geometry. But I don't want to redo the blocking. How do I do that?
  
• 4.10. I get a decent mesh when I have the first cell height of 0.01 in my model. However, I start getting lot of negative cells when I reduce it to 0.0001. What is going on?
  
• 4.11. I write "hex.uns" mesh from HEXA and I get lot of missing face errors as well as uncovered faces in MED. Why?
  
• 4.12. I have complex blocking and Hexa takes a lot of time to do splitting. Why is that and how do I stop that?
  
• 4.13. My Hexa blocking gives enormous error/warning messages which keep scrolling for several minutes. How do I stop that?
  
• 4.14. How do I reduce number of blocks in HEXA? They become enormous and it's difficult to handle that many for my multi-block solver. Is there any way to “optimise” them?
  
• 4.15. I can't remove my link bunching? Also it gave error of "impossible link bunching" when I did the linking. What to do?
  
• 4.16. Why does 2D->3D translate not extrude normal to the 2D blocking?
  
• 4.17. How do I change the number of points or first/last cell spacing in one shot for multiple edges in a replay file?
  
• 4.18. Can I define variables in HEXA? Can HEXA get variables defined outside, say in MED?
  
• 4.19. I am able to generate a very large Hexa mesh (more than 32 million cells) on a 64 bit machine. But while writing it, Hexa process is exited. Why?
  
• 4.20. I am trying to split a particular face but it also splits another face somewhere else. How to overcome this problem?
  

• 5.1. What is the best way to run tet to hex?
  
• 5.2. I want to have hex mesh to resolve my boundary layer and the rest of the region to be filled up by tetras. How do I do that?
  

• 6.1. Why do my loops fail for cylindrical surfaces?
  
• 6.2. What is the difference between quad meshes that I get from Tetra and then converting into quad as opposed to the quad mesh that I get from QUAD?
  

• 7.1. What are the file formats that the output interface supports?
  
• 7.2. Why can't I write Fluent output for a hexa mesh having refinements?
  
• 7.3. I see HDF format to write my mesh output but the executable is not there. Why?
  
• 7.4. Why don't I see GASP or GUST interface on windows?
  
• 7.5. I don't see CFL3D executable on Windows. Why?
  
• 7.6. I have a 2D domain file but I can't read it in Fluent. Why?
  
• 7.7. I cannot read a mesh into Fluent. It's a hexa mesh and I have done collapsing there. Why?
  
• 7.8. I have multiple materials in my HEXA blocking and I have defined shared wall between them. Why can't I write the Fluent output for the same?
  
• 7.9. I want to define pressure boundary for Ansys Interface. When I write the output, the bcs don't come in the input file. Why?
  
• 7.10. For Nastran Output, is it possible to get thickness parameter information attached on shells created with 'surface> Midsurface' function,
  
• 7.11. Why do I get "Incorrect node count (13404 != 13392)" type of message when I do "Grid Check" on a Fluent mesh inside Fluent?
  
• 7.12. How do I output the element material numbers in the nastran input file?
  
• 7.13. I want to use replay file to write Fluent output for my multiple models. Looks like it is broken. How do you do it?
  
• 7.14. The mesh looks fine in Med, but Output to NASTRAN results in mesh with all nodes squished into one plane,why does this happen?
  
• 7.15. I wrote output for CFDesign from ICEM CFD 4.3.1 but looks like my CFDesign version cannot read this file. Why?
  
• 7.16. What are the supported element types and material properties/keywords in AI*Environment for Ansys, Nastran, LS-Dyna, and ABAQUS?
  

• 8.1. What is the difference between "Close gap" and "Close hole"?
  
• 8.2. How does Match work in Stitch/Match Edges?
  
• 8.3. Which triangulation tolerance is best?
  
• 8.4. How are Close Holes and Remove Holes different?
  

• 9.1. How do I close a hole in STL data?
  
• 9.2. How do I stitch edges in STL data?
  

• 10.1. What is new in Visual 3 Ver. 2.0?
  
• 10.2. Why can't I run Visual3/Post-Procesing in Ansys ICEMCFD/AI*Environemnt 5.0 version?
  

• 11.1. What are the changes in the last release as compared to previous release?
  
• 11.2. What are the changes since last release?
  
• 11.3. What are the changes in 4.1.2 as compared to 4.1.1?
  
• 11.4. What are the changes in 4.1.3 as compared to 4.1.2?
  
• 11.5. What are the changes in 4.2(.1) as compared to 4.1.3?
  
• 11.6. What are the changes in 4.2.2 as compared to 4.2.1?
  
• 11.7. What are the changes in 4.3.1 as compared to 4.2.2?
  

• 12.1. Why does my prism mesher behaves erratic on periodic problems when I select the periodic boundaries?
  
• 12.2. Why do I loose my periodicity when I convert one type of element to another?
  
• 12.3. Why do I get screwed up tetra mesh even though I switched on "auto-fix non-manifold"?
  
• 12.4. On linux, in DDN, why do I get "segmentation violation" when I convert my surfaces into B-spline surfaces?
  
• 12.5. Why does it take so long to write tetin files through I-Deas Mesher interface?
  
• 12.6. why does the message impossible linking appears when we generate hexa mesh ?
  
• 12.7. When I import ACIS files, why do some of my surfaces come in as faceted surface data?
  

• 13.1. On Windows NT/2000, why does my Flexlm return "ffff" or "0"?
  
• 13.2. On linux, DDN fails because it can't find libXm.so.1
  
• 13.3. On linux, why do buttons on my pop-up windows take so much time to appear?
  
• 13.4. On linux, why do my windows get placed outside the desktop?
  
• 13.5. On HP, why does it reports for "missing library libhpgfx.1"?
  
• 13.6. On Windows 2000, why can't I see my mouse pointer?
  
• 13.7. On windows, when I quit Hexa, I get application error and my license doesn't get released. Why?
  
• 13.8. How do I automatically start my license server everytime my machine gets rebooted?
  
• 13.9. Where do I get general information about FLEXlm?
  
• 13.10. Where do I find ICEM CFD's FLEXlm tools?
  
• 13.11. What kind of licenses does ICEM CFD support?
  
• 13.12. What is the minimum/maximum OS level, that we support on all platforms in the upcoming release?
  
• 13.13. Why does lmdiag report "This license cannot be checked out ..." for valid INCREMENT lines.
  
• 13.14. On my UNIX machine, I have 2Gb memory, still MED seems to take only 512Mb memory. Why?
  
• 13.15. Why can't ICEM see some of the files/directories on my linux machine?
  
• 13.16. Why does Mesh Editor reports for an error in writing .icemcfd_history_project file when I fire it up in windows 2000?
  
• 13.17. What are the minimum OS levels for the standalone ICEMCFD modules?
  
• 13.18. I am having a problem with the ICEMCFD 4.2 installer on XP. When I run it,I get an error message: "1608:Unable to create InstallDriver instance". What's happenning?
  
• 13.19. I am trying to use installer of ICEM CFD on sgi and gets to a point and gets the error: "Error in Tcl script Error: can't find controlling terminal". What is the reason?
  
• 13.20. I have installed ICEM V4.2 on my windows machine. Since then, whenever I boot my machine, a console window pops up with the message "C:\>del C:\TMP\pvm*.*". What is pvm? Is that really needed? How can I get rid of that?
  
• 13.21. I have installed ICEM CFD version 4.2 on my windows machine. Everytime I run Mesh Editor, I get the error with "med [ options ] [ file_name ] while executing...." and program crashes? What's wrong here?
  
• 13.22. Why do you guys use ICEM_LICENSE_FILE? PTC's Surf uses the same and it creates problems for us.
  
• 13.23. When I fire up ICEM CFD on Solaris 9 machine, vendor daemon dies. What is happening?
  
• 13.24. I have Octane II. ICEM CFD (at least DDN) doesn't seem to be running OK on this. What to do?
  
• 13.25. I am finding periodic core dumps and graphics time lags on my SUN machine. What should I do to improve the situation?
  
• 13.26. I am trying to use the "check license" facility but it comes up with no license data available, though I have a valid license. Why?
  
• 13.27. On windows (2000), when I fire ICEM CFD, I get the message "The instruction at 0x690d4cfc, referenced memory at 0x00000004. Memory could not be read.". What is happening?
  
• 13.28. On Redhat 9, I cannot install ICEM CFD 4.2.2. The installer crashes with "segmentation fault". What do I do now?
  
• 13.29. When I fire ICEM CFD on Redhat 9, I get a message "Incorrectly built binary which accesses errno, h_errno or _res directly. Needs to be fixed.". Is it ok to proceed?
  

• 14.1. I just saved my DDN part on NT but why I can't read it in UNIX?
  
• 14.2. I have HP3600 9000/785 machine. My DDN shows up dialog boxes in sharp green color. How do I get rid of it?
  
• 14.3. How can I define all tetra parameters inside COMAK?
  
• 14.4. How do I merge different DDN parts? Can they have different levels or even colors?
  

• 15.1. On windows, why does my cartesian mesher fail in AutoHexa?
  

• 16.1. Configuring Solaris for ICEM CFD
  
• 16.3. Configuring HP for ICEM CFD
  
• 16.4. Configuring Linux for ICEM CFD
  
• 16.7. Configuring Digital Unix for ICEM CFD
  
• 16.8. Configuring Windows98 for ICEM CFD?
  

• 17.1. Who is doing support for DDN 5.0?
  
• 17.2. How do I run ICEM DDN 5.0 if "ICEM_ACN" is used by ICEM CFD, or ICEM Surf, or an old version of DDN?
  
• 17.3. How do I modify the path of the working directory?
  
• 17.4. DDN freezes during starting.
  
• 17.5. Supported graphics cards on WinTel platforms.
  

• 18.1. Why don't I see ICEMCFD buttons inside UG?
  
• 18.2. Why does UG interface give me "library" problem? I am running Windows NT!
  
• 18.3. I have installed UG interface under "C:\Program Files". Why can't I launch UG mesher interface inside UG?
  
• 18.4. Why does UG session get killed when I click on Application->Icemcfd?
  
• 18.5. How can I tell if my UG part is corrupt?
  
• 18.6. How do I troubleshoot a UG Direct CAD Interface Installation?
  
• 18.7. I'm using Windows, where does the UG interface write the tetin file?
  
• 18.8. What is ICMIF_ACN?
  

• 19.1. There are three interfaces for SDRC -- why?
  
• 19.2. What is IDI? What is IDI -> Tetin?
  
• 19.3. How do I write an IDI file?
  
• 19.4. Why don't I get a clean tetin file from I-Deas direct CAD interface?
  
• 19.5. What is SDRC_INSTL?
  

• 20.1. Why doesn't my direct ProE->Tetin reader work? I am on windows NT.
  
• 20.2. Why won't the Pro/E Interface work with the installed version of ICEM CFD 4.3.1?
  
• 20.3. My ProE Interface worked just a few days ago, now it doesn't even come up. Nothing has changed. What's the problem?
  

• 24.1. What is the minimum/maximum OS level that we support on all platforms in the first release?
  
• 24.2. Why can't I go to Hexa with "new blocking" using ICEM CFD 4.CFX on Windows2000?
  

• 25.3. What's new in the AI*Environment 1.0/ICEM CFD 4.CFX Release?
  
• 25.4. What's new in the AI*Environment 2.0 release?
  

• 26.1. What's new in ANSYS ICEM CFD 4.3.1 service pack?
  

• 27.1. What's new in ANSYS ICEM CFD/AI*Environment 5.0 Release?
  
• 27.2. What is the minimum OS level we support on all platforms in 5.0 release?
  
• 27.3. Known and Open issues in 5.0 release
  
• 27.4. What's the difference between ANSYS ICEM CFD 5.0 (CFD version) , AI*Environment, "AI*Environment + CFD Utilities" , and ANSYS ICEM CFD for CFX?
  
• 27.5. How do I control ANSYS vs. ICEM CFD licensing? That is, if I have ANSYS licensing and ICEM CFD licensing and I want to use one or the other, how do I do this?
  
• 27.6. What is the difference between the following license keys: output, aioutput, aienv_sub, and aioutcfd?
  

• 28.1. What's new in 5.0 service pack 1?
  
• 28.2. Why can't I run ICEMCFD old GUI with ICEM_CFD licensing on windows?
  
• 28.3. Why am I getting TCL error for surface creation?
  
• 28.4. What's new in Service Pack 2?
  
• 28.5. Do I need to install both the service packs together?
  
• 28.6. Why can't I see the geometry in Advanced Meshing when coming from DesignModeler?
  

• 29.1. What's new in ANSYS ICEMCFD/AI*Environment 5.1?
  
• 29.2. Platforms/minimum OS levels supported by ANSYS ICEMCFD/AI*Environment 5.1
  
• 29.3. Known and Open issues in ANSYS ICEMCFD/AI*Environment 5.1
  
• 29.4. Why can't I run existing icemcfd script in batch mode?
  
• 29.5. What is the difference between Basic with CAD Environment and Basic with Advanced Geometry support?
  
• 29.6. Why do I get error message when trying to import DWG/DXF file?
  

• 30.1. What's new in 5.1 Service Pack1?
  
• 30.2. Why am I getting tcl error after I install the 5.1 service pack?
  
• 30.3. Why does ICEMCFD license fail for 5.1 sp1 on AMD64?
  
• 30.4. What's new in 5.1 service pack 2?
  

• 31.1. What's new in ANSYS ICEMCFD/AI*Environment 10.0?
  
• 31.2. Platforms/OS levels supported in ANSYS ICEMCFD/AI*Environment 10.0
  
• 31.3. Known and Open issues in ANSYS ICEMCFD/AI*Environment 10.0
  
• 31.4. How can I use DDN application in 10.0 version?
  
• 31.5. I get some shared library problem when ruuning ANSYS ICEMCFD 10.0 on SELinux. How can I fix it?
  
• 31.6. The start up of ANSYS ICEM CFD 10.0 is very slow, why?
  
• 31.7. Pro/E interface does not work for windows in 10.0. Why?
  
• 31.8. Why is ICEMCFD 10.0 not working with German regional settings on systems with SFU installed?
  
• 31.9. Why can't I launch Help when using a 32bit version of ICEMCFD 10.0 on a linux 64bit system?
  
• 31.10. Cart3D on windows fails in 10.0. Why? Workaround?
  
• 31.11. My application crashes when moving/rotating geometry on windows. Why?
  
• 31.12. Model gets disappeared or GUI gets frozen for sometime when selecting mesh/geometry with rubberband (dragging rectangle) selection. Why? Workaround?
  

• 32.1. What's new in 10.0 Service Pack 1?
  
• 32.2. What's new in 10.0 Service Pack 2?
  
• 32.3. What's new in SP3 for Linux64_AMD?