Why does the free thermal expansion of a piezoelectric cube produce a large voltage? |
This is defect 79830, which has been fixed for 12.0. We do not account for the "thermal strain charge" in our piezoelectric FE formulation. The "thermal strain charge"... |
Why won't my shear-loaded orthotropic material buckle? |
Setting BUCOPT,LANB,5,100,10000 may correct the problem. It is documented that if you have trouble in a buckling analysis, you should try inputting reasonable values for the SHIFT/LDMULTE value on... |
How can I speed up results retrieval after a big Simulation 11.0 remote solve? |
Unneeded binary files that are transferred across the network may be causing the slowness. At version 12.0, unneeded binary files will not be transferred. To delete these files before the transfer... |
Can you scope a temperature load to a body in a Simulation thermal transient? |
A temperature load is applied to nodes, whereas a body usually receives element loads. In this case, the temperature is applied to the nodes on the surface of the body.<br><br>You... |
How can I specify a temperature-dependent emissivity in Simulation 11.0? |
Temperature-dependent emissivity is not supported by the Simulation graphical interface, but it can be specified with a Commands Object like the one below. The database with these commands is... |
Why does radiosity between bodies in Simulation 11.0 (created with Commands Object) seem incorrect when contact is used but correct when multibody parts are used? |
When Simulation detects linear contact, it sets NEQIT,1, which is not sufficient to converge the radiosity solution. If you add NEQIT,5 to your Commands Object, it will give good results with contact.
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For modeling overdriven detonation of explosives in AUTODYN 11.0, using classical JWL EOS, is it possible to apply a 'constant burn volume' model? |
<br><br>The constant volume burn - In cases where the fine details of the detonation within the explosive charge are of little significance, the chemical energy can be added to the... |
In CFX-Post, is there a way to output the numerical data from an existing chart into a table?
**** Entered By: rlange @ 01/05/2009 10:40 AM ****
ANSWER:
When you make a chart in CFX-POST, you should see a button 'Export' next to the 'Apply' button. Clicking that produces a '.csv' file that will have some header information in it. If you double click on that, it opens in Microsoft Excel.
Suppose you wanted to import such a table in CFX-Pre? Make a copy of it and change the extension to .txt. It is now a simple text file. Put it in an editor and remove all the header information so that the first pair of data is the first line.
You can import into a table by choosing 'Insert> 'Functions > User Function.' Then in the while space under Interpolation data (under Coordinate, Value) right click and choose import. |
<br><br>Q:<br><br>In CFX-Post, is there a way to output the numerical data from an existing chart into a table?<br><br><br>ANSWER:<br><br>When... |
Class 3 Error
SYMPTOM:
For the supersonic inlet conditions, the solver interprets always the total pressure in the rotating frame. This is not true when the inlet is in the rotating domain and the user has set the frame type to stationary.
PROBLEM:
This is due to a coding bug i |
WORKAROUND:<br>No workaround is currently available.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0.
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I have installed the ANSYS Workbench 11 SP1 and the ANSYS CFX 11 SP1 software on my Windows XP 64-bit machine. When I try to open a file in CFX-Pre in ANSYS Workbench I get the following message:
===================
CFX-Pre Start Failure
CFX-Pre terminated while attempting to connect to Workbench.
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I installed the 32-bit versions of Workbench and CFX 11 SP1 because of CAD issues. |
On a Windows 64-bit machine it is expected that the 64-bit versions of Workbench and CFX would be installed; the issue being seen is due to having installed the 32-bit... |
How can I obtain the position of a character in the name of the current directory? |
In ANSYS Release 11.0, the /INQUIRE and STRPOS() commands can be used to obtain the position of a character in the directory name. The INQUIRE command can be used to store the directory name in a... |
I cannot read a .anim file into the Animation utility. The following error occurs when trying to read this file into the animate utility: "Animate Program has encountered a problem and needs to close." |
It may be that DSGStreamN.dll is not registered. You may try the following from a Windows command prompt:<br><br>cd c:Program FilesANSYS... |
Question: Wall heat flux, and other boundary fields, on an internal thin wall show a pattern or strong variations
Answer:
One possible reason is the underlying thin surface mesh definition, especially the orientation of the face normals. If this is not consistent for the whole surface, then the element faces are partly assigned to either side of the thin surface. The result is correct, but visualization is confusing.
The issue can be seen clearly in ICEM CFD when you open your mesh and in the Model Tree under 'Shell' check the 'Face Normals'. The 'Face Normals' at the surface by default should all point into the volumetric domain. For outer walls this is done automatically but for inner walls this is not done.
The user can change this in ICEM CFD with the option EditMesh --> Reorient Mesh -->Reorient Consistent.
To accurately view the results in CFX-Post, you would need to use the 'Face Culling' under 'Render' to view the variables of the inward and outward facing elements. |
Question: Wall heat flux, and other boundary fields, on an internal thin wall show a pattern or strong variations<br><br>Answer:<br><br>One possible reason is the... |
In Workbench Simulation v11, can I use nonzero displacement conditions in a linear buckling analysis? |
Yes, but please be aware that when you apply non-zero displacements, the displacement plots will show zero, even if the scaled displacements will cause buckling. As a result, it is important to... |
In Workbench Simulation v11, can I use nonzero thermal conditions in a linear buckling analysis? |
Yes, but please be aware that when you apply non-zero temperatures, it is the applied temperature with respect to the reference temperature that is scaled, so it is the difference (T-Tref) that is... |
The CADNexus CAPRI Master.exe test application no longer runs for dates after January 1, 2011.
CAPRI FATAL: Invalid Key! |
Replace the following registry key with the information shown below.<br> .Reg file is attached to this incident for... |
Does ANSYS re-form the system matrices at each time step? |
The direct solvers (frontal and sparse) contain internal logic to determine whether or not the matrices need to be reformed. This feature is turned on by default, and rarely needs user... |
Is it possible to configure the Ansys Catia V5 geometry interfaces to recognize customized Catia V5 Environments? An example may be DLNAMES, where Part files are stored in logical locatations, rather than directories. |
See instructions below on how to configure geometry interfaces for use with customized Catia V5... |
I would like to export the deformation (or other result) of a node over time to a spreadsheet. I have taken the /OUTPUT-with-PRVAR approach to get a *.lis file, but this file contains additional page header information. I looked at the /PAGE command but this does not apply to /POST26. How can I get rid of the words in the listing file? |
You can resolve this issue in either of the following ways:<br><br>(1) While the /PAGE file applies to /POST1, the LINES command applied to /POST26. You can simply set a large number... |
I have put in damping in some modes in modal analysis before solving. Now, I would like to review which are the modes I have place damping in. Can I do that? |
To list the values entered using the MDAMP command, you can simply use the STAT command to view the list (see documentation for MDAMP command). Also, please note that values specified for MDAMP... |
Are there any PIPE59 examples showing what is meant by some of the real constants? It is not clear as to what is included in each. |
Yes, please see the ANSYS 11.0 SP1 PIPE59 input file that is attached. It is fully commented and verifies that the correct reactions are obtained for the given loads and real constant input.
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Does the Ansys Workbench plugin support SolidEdge ST Synchronous Technology? |
We are able to use the Ansys plugin when in the "traditional" mode of SolidEdge ST. In the new "ST" mode, the Ansys plugin menu does NOT appear. Essentially, the ANSYS... |
What is the CAD Preference Mixed Import Resolution used for? |
The CAD Preference Mixed Import Resolution exists because the Ansys Workbench mesher can only accept Parts that contain "bodies" consisting of either "all solid" or... |
Class 3 Error
SYMPTOM:
If particle mass flows are calculated in the CFX Solver, and then used in CFX-Post in a parallel run, then the values will be wrong at partition boundaries. This will show up both in display of mass flows and also in quantitative calculations such as sums of mass flows and mass flow averages of other particle vertex variables.
PROBLEM:
This is caused by incorrect communication between the partitions in the algorithm for calculating th |
WORKAROUND:<br>No workaround is currently available.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0.
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How can I define orthotropic coefficients of thermal expansion in Workbench Simulation? |
You may define ctex, ctey, and ctez material properties in a Command Object under the geometry branch. A user-defined coordinate system number should be used to orient the element coordinate... |