Q. I am solving a CHT problem in CFX with multiple domains connected with 1:1 interfaces. Near the interfaces I see temperatures that are physically unreasonable. What should I do?
A. Try changing the interface type to GGI. It has also been shown that resolving the temperature gradient near the interface with inflation layers will help. |
Q. I am solving a CHT problem in CFX with multiple domains connected with 1:1 interfaces. Near the interfaces I see temperatures that are physically unreasonable. What should I... |
If a user accidentally overwrites his valid license file with an expired license on UNIX, the license manager will not start, even after reinstalling the valid license.
Why doesn't my License Manager start? |
You have to reinstall the valid license, and then either kill the lmgrd process, and then start the license manager again, or reboot if you have an boot_ansflex file set up.
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I have created a def file under Windows and want to start it on Linux. The solver crashes with the following error message. What's wrong?
ccl2flow exited with non-zero return code
CFX5::Commands::Result=HASH(0x40f8ea70) |
The setup uses a user profile from a csv file. In the run CCL the path is given in DOS format (C:/path_to_file/data.csv).<br> Please change the CCL to ./data.csv and put the data file to... |
Q. I am doing a simulation in a high aspect ratio geometry (a tunnel) and would like to view plots along the tunnel in full length. However, it is very difficult to see the (thin) line of the tunnel using standard contour plots (for example). Is there a transformation to help in CFX-Post?
A. The simplest way would be to rotate the model so you are looking very obliquely at the tunnel. That is, almost looking straight down the tunnel but from slightly to one side. A better way would be to use a scaling. Generate the contour plot and then edit it and switch to the View tab. Near the bottom is the Apply Scale option, and you can check this on and apply a much reduced scaling in your tunnel axis direction. This way, any plots along the length of the tunnel would be squeezed up and easier to see. Also, if your tunnel is not planar you could scale it in the horizontal direction as well to make things easier. |
Q. I am doing a simulation in a high aspect ratio geometry (a tunnel) and would like to view plots along the tunnel in full length. However, it is very difficult to see the (thin) line of the... |
Q. CFX appears to stop at the first opportunity saying a solver (or partitioner) "executable is required for this run, but none is available". The installation, however, appears to be correct.
A. It could be that you have a quite recent Opteron AMD64 machine and one of our programs is incorrectly identifying it as a K6. If this error is made, the solver tries to look for a different 32-bit executable, and hence does not find it within the 64-bit installation. This bug has been fixed in our Service Pack 1 for CFX-10. You can download it from the customer portal at http://www1.ansys.com/customer/ provided that you have the password. |
Q. CFX appears to stop at the first opportunity saying a solver (or partitioner) "executable is required for this run, but none is available". The installation, however, appears to... |
A customer is trying to compress many .rst files in a row and all the resulting files but the last one are corrupted. Why is this? |
It seems that the problem is that Ansys launches many threads and works on different .rst files in the same time and thus the files are corrupted.<br><br>The solution is to insert... |
I am running a case on a Linux Opteron system in CFX 10.0. I notice that the solver manager output file window lags behind the residual monitor output on during the run. The output file is not continuously refreshed, but instead several timesteps will be updated at once. This makes it difficult to stop a run at a given point or tell exactly which iteration it is on. |
<br><br>The solver manager output file display lagging behind the residual plots is a known problem on Opteron systems. It is the output file itself that is not refreshed... |
Does PPFA (Parallel Performance for ANSYS) support SOLID117 in harmonic response analyses at ANSYS v10/11? |
Though it is not stated in the v10 documentation, harmonic response IS supported, however, SOLID117 is NOT supported. Only SOLID96, SOLID97, SOLID122, SOLID123, SOLID231, SOLID232, and SOURC36... |
Can I generate a tetra mesh in parallel using ICEM CFD 10.0? Can I do this on Windows and Linux? |
Go to Under the Help in ICEM CFD 10.0 and search for Multiple processors. There is a description of how you can specify the number of processors for local parallel in tetra/prism.<br>This is... |
In ANSYS Workbench 10 SP1, when resuming or meshing large models with more than 4GB of memory, we are experiencing crashes or
unpredictable behavior, Why? |
Microsoft has issued Update 912812, which will correct the large memory access problem encountered with Release 10.0 Service Pack 1 on<br> Windows XP Professional x64. To update your... |
Why can't I read my Iges geometry file into Ansys Classic with the IGESIN command? |
Check the Import Summary, and if you see the word "UNSUPPORTED", the Iges file contains surface entities that cannot be translated by the IGESIN Command.<br>See example... |
My animation in ANSYS Workbench Simulation 10.0 shows negative
equivalent plastic strains, but this cannot be correct, right? |
Defect 39250 was filed and subsequently fixed in the daily build of<br> ANSYS 11.0. The Preview 4 build (which will be used at the ANSYS<br> 2006 Conference) will have this... |
I am preparing a conjugate heat transfer case in CFX 11.0. In my simulation there are coils of flat strips of copper separated by glass/epoxy insulation. The effective thermal conductivity in the direction normal to the insulation is ~1/10th the conductivity of copper. Can I set up anisotropic thermal conductivity? |
<br>Set up your case in CFX-Pre and edit/define a material. Enter a dummy value for conductivity. At this point you now need to manually edit the CCL for that material definition. Export... |
Does ANSYS support the Puck Failure Criteria? |
Not directly, but you can always create your own failure criteria, as noted in the<br> documentation:<br><br>"User-written failure criteria may be specified via user... |
Is there any information on PSD statistical average frequency? |
Please see the attached .PDF files covering pages 323 through 328 of the<br> November 14, 1994 tutorial "Random Vibration for Revision 5.1", which is<br> no... |
Environment variables set in the cfx5rc file are not being recognized by cfx |
<br>Some variables, such as those described in the help manual are specifically looked for and passed to cfx.<br>Other variables may need to be exported for cfx to see... |
Does Workbench work with queuing and linux clusters? |
Workbench 11.0 will be able to submit jobs to a Linux LSF Cluster.<br>They are working on this feature. It will be possible either out of the box or through customization.
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######## WORK NOTES COPIED FROM INCIDENT 498342 ########
**** Entered By: abarthel @ 05/03/2006 11:20 AM ****
Q : How to put the results of PRESOL,F & PRESOL,M in parameters ?
A : The results of PRESOL,F & PRESOL,M can be retrieved by uncommented command : *get,fx,ELEM,n°elem,EFOR,n°node,fx & *get,mx,ELEM,n°elem,EFOR,n°node,mx |
######## WORK NOTES COPIED FROM INCIDENT 498342 ########<br>**** Entered By: abarthel @ 05/03/2006 11:20 AM ****<br>Q : How to put the results of PRESOL,F & PRESOL,M in... |
What port does the CFX parallel processing use when using the RSH function on Windows? |
<br>For RSH incoming connections are created on port 514 and outgoing connections are created on ports 512 to 1023.
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CFX fails while running in parallel using MPICH with the following error:
p4_error: semget failed for setnum: 0 |
<br>MPI uses semaphores to access shared memory areas and the error message means the CFX failed to get a semaphore.<br>This can happen if an earlier run has crashed and the shared... |
How to import measurement data into ANSYS CFX, to compare it with the calculated data? |
You can import measured data by following the next steps, but it has to be at least three measurement values.<br><br>- load case in CFX-Pre<br><br>- define... |
Q. The inclusion of temperature dependent coefficients for TB,PRONY generates incorrect answers. This problem appears to be new to release 9.0 as the input works correctly at release 8.1. The program apparently can retrieve the correct coefficients, as indicated by the *GET command but the use of the coefficients to perform the analysis appears to use incorrect values. What is the resolution?
A. This was a class 3 error regarding the proper handling of temperature dependent viscoelastic relaxation data.
It has been corrected for 10.0 Service Pack A1 and 11.0. |
Q. The inclusion of temperature dependent coefficients for TB,PRONY generates incorrect answers. This problem appears to be new to release 9.0 as the input works correctly at release 8.1. The... |
Q. Why does an unconverged nonlinear buckling analysis produce the error message,"Error opening split file= file.rst**" ?
It only happens in /POST1 when you try to read in the last successfully converged substep saved to the rst file.
It is not a large model and no file splitting has actually occurred.
A. This was a code defect in 9.0 and 10.0 (Defect report 44059). It is fixed at 11.0. Problem was that once ANSYS could not bisect anymore, rather than exiting gracefully at that point we went onto the output pass. Since we had hit an error, we only wrote the displacements to the rst file and skipped the element results. We then went through the normal "abort" process where we wrote the 99999 unconverged solution (both displacements and stresses). If you went to postprocess this rst file, the last solution (99999) was fine; SET,PREV reads incomplete information that subsequently triggers the misleading error message.
The code fix is to make sure we exit gracefully in this case. |
Q. Why does an unconverged nonlinear buckling analysis produce the error message,"Error opening split file= file.rst**" ?<br>It only happens in /POST1 when you try to read in... |
Customer is getting the following licensing error when using Parasolid Reader at ICEM CFD 10.0 with service pack:
"C:/Program Files/Ansys Inc/v100/icemcfd/win/bin/pstotin"
"C:/C-Working/Distribution Blower/SC00206 CFD/SC00206008a.x_t"
"C:/C-WORK~1/DISTRI~1/SC0020~1/SC00206008a.tin"
ICEM CFD - Parasolid Reader 10.0 (Build 5.10.24.15)
Parasolid Kernel Version 17.0 (Build 129)
Copyright (C) 2002-2005 Ansys Inc./ICEM CFD Engineering
Checking for License...Failed.
child process exited abnormally
Tetin file C:/C-WORK~1/DISTRI~1/SC0020~1/SC00206008a.tin does not exist
Done.
Why is the user getting this error when he does have a valid rdpara license? |
The service pack for ICEM CFD 10.0 has a defect that causes the rdpara license not to work with ICEM CFD. The work-around would be to send the customer a license for ANSYS ICEM CFD Parasolid... |
Are there plans to port WorkBench for the 64-bit Linux Opteron systems? And if so, when is it planned to be available? |
Yes, we are planning a port for AMD Opteron 64-bit for WorkBench 12.0.
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