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I built a library for a CFX routine using cfx5mkext on a Linux box using the Portland Group compiler. I tried to copy the library files to a different machine and use them for my run, but the solver stopped with an error about a missing routine. What do I need to do to be able to use the libraries I compiled and built on another machine?

You can either edit the cfx5mkext.ccl file and add the parameter -Bstatic_pgi to the link options or you can include the -Bstatic_pgi flag when you issue the cfx5mkext command: i.e., for a file...

I would like to compile and link a CFX 11.0 user fortran routine on a system which has the Portland group fortran compiler installed but which does not have CFX 11.0 installed.

How can I do this?

You can always get the syntax of the required fortran compile and link commands by running the cfx5mkext command on a system which does have CFX installed.<br><br>There are number of...

Class 3 Error

Unreliable results will be generated for ANSYS Multi-field (MFX) simulations that include both unmapped nodes on FSI interface(s) and 1:1 interfaces elsewhere in the CFD domain(s). Symptoms may include a crash or incorrect results.

The identification of unmapped nodes leads to the corruption of the connectivity arrays for the 1

WORKAROUND:<br>Use a GGI interface instead of a 1:1 interface.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0. A custom executable for ANSYS CFX Release 11.0 Service Pack 1 is available on...

A customer has found that the setting of "ansyslmd.opt" will not become effective by clicking the "Reread the License File" button in the ANSLIC_ADMIN Utility. However, the changes become effective when he selects "Stop the License Manager" followed by "Start the License Manager".

Why isn't the "Reread the License File" button working as it should?

Macrovision was able to reproduce this problem in lmflex.c. Until Macrovision resolves this issue, we recommend stopping and restarting the license manager when the options file is changed. Once...

Why do equivalent elastic strain calculations for hyperelastic materials use an effective Poisson's ratio of zero in Workbench 11.0 and 0.3 in Classic 11.0.

This was an error in the code that was corrected as part of Defect 59367 (Class 3 error). It is confirmed fixed for 11.0SP1 and 12.0.

Expressions involving angles may give seemingly different values in the CFX Solver, CFX-Post and CFX-Pre. The CFX Solver will evaluate expressions in radians, but by default CFX-Post and CFX-Pre will evaluate expressions in degrees.

There is a problem with the unit systems CCL file, which incorrectly has the SI unit of angle being degrees rather than radians.

WORKAROUND:<br>In CFX-Post, it is possible to choose a Custom unit system, and by selecting 'radians' as the Angle Units, one can make the values consistent with the Solver....

Class 3 Error

When using a regular hexahedral grid, or something similar, it is possible for a Plane created at constant X, Y or Z to exactly coincide with faces of elements, especially at boundaries of domains or subdomains. In these circumstances, CFX-Post may fail to locate some of the points on the plane and graphics would show uncoloured regions around these points. Moreover, quantitative analysis on these planes (e.g. area averages) would then be incorrect.

There is a problem in the way that CFX-Post searches for point

WORKAROUND:<br>If possible, move the plane slightly away from element boundaries.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0.

Under certain circumstances, calling USER_GET_GVAR causes the solver to fail with the following error message:

Details of error:-
Error detected by routine PEEKCA

There is a problem with using USER_GET_GVAR with additional variables.

WORKAROUND:<br>No workaround is currently available.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0. A custom executable for ANSYS CFX Release 11.0 Service Pack 1 is available on...

Class 3 Error

If a Reynolds Stress turbulence model is used for a multi-domain simulation, then there is potential for the solution to be in error.

There is a bug in how the residual of the Reynolds Stress tensor is adjusted at symmetry planes (and periodic axes) for multi-domain

WORKAROUND:<br>Use only a single domain, if that is possible.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0. A custom executable for ANSYS CFX Release 11.0 Service Pack 1 is available on...

I installed CFX-11 SP1 and noticed that CFX-Pre is much slower to start than CFX-Pre 10.0. (Pre 11.0 SP1 took over 3 minuites to start, Pre 10.0 was taking about 30 s). Why is it so?

It could be related to the following case:<br><br>The problem was related to an error in the licensing setup, associated with the fact that the machine name had been...

(1) Mixture Fraction and Mixture Fraction Variance variables are an important part of Flamelet and Partially Premixed Combustion Models. Species are stored in the Library as a function of Mixture Fraction. Why cannot I see these variables in CFX-Pre under FLUID MODELS? Can a user set an arbitrary diffusivity for these variables?

(2) Species in the Flamlet library are also function of Scalar Dissipation Rate. What is the diffusivity value used in the expression for the Scalar Dissipation? Can the user change it?

(1) The mixture fraction and mixture fraction variance equations DO NOT appear under FLUID MODELS in CFX-Pre but they are solved as NORMAL TRANSPORT EQUATIONS and so require boundary conditions to...

How is the adiabatic Flame Temperature for a particular reaction determined?

Adiabatic Flame Temperature is determined by using the first law of thermodynamics in an adiabatic situation.<br><br>Change in Enthalpy = Q = 0<br><br>The evaluation is...

Why is customer receiving the error message "AnsysWBU.exe has encountered a problem and must close" when starting Workbench 11.0?

This can happen on some machines if there is an AUTODYN entry in the registry, but the customer does not have AUTODYN installed. After removing the following AUTODYN entry from the registry, the...

User runs an analysis with the REINF265 elements without error. He leaves solution, re-enters and tries to resolve. He gets the error message below. What is the meaning of this message and what is the workaround?

*** ERROR ***
"No base element is found for reinforcing Element x.
Use of isolated reinforcing elements is not permitted."

This is a code defect at 11.0 (Defect report 62469) due to the new internal node created during the solution for the base element to hold pressure DOFs. Reinforcing elements failed to recognize...

Is there a simple example of the use of the FLUID116 element to cool a heated block?

Yes. Attached is an input file. The block is a quarter symmetry model of a solid cylinder with a cylindrical passage running through the center of the block. The outside surface of the block is...

Following a hard disk failure we have recently had to re-install the operating system and software on our Linux workstation. Having done this I am having difficulties getting CFX to run correctly, in particular CFX-Pre and CFX-Post. An example of the error messages produced when starting CFX-Pre or CFX-Post are included below. It looks as if a library or other required software may be missing. The OS is Red Hat Linux AS 4.

The application has encountered an unexpected problem:

QGLContext::makeCurrent(): Cannot make invalid context current.

Please report this error, along with the circumstances in which it occurred.

Alternatively, you may attempt to continue, but the application may be in an unstable state, and you should save your work and restart the application as soon as possible.

The following information may be useful to CFX support:

src/QTApplication.cxx(48) : Expectation failed:
QGLContext::makeCurrent(): Cannot make invalid context current.

This is due to a problem with the OpenGL installation made when the OS was re-installed after the machine crash.<br><br>Suggestions are:<br><br>1) If you are running...

I have started exploring the new options in version 11.0 and discovered that I can't run the Hexa-Dominant or Cartesian Mesh options due to licensing issues.

I get the message 'Cannot run this application with this licensing' or something similar to this.

My ICEM CFD license file has the following options:-


Do I need a different option?

Hexa-dominant meshing and Cartesian meshing need license keys that are not present in your current license file.<br><br>Hexa-dominant meshing needs the aihexa license key (given with...

How do you define the field solver interface if it is both structure-electrostatic and structure-fluid? Can I use SF,all,FSIN twice for the structure surface (one for structure-electrostatic, the other for structure-fluid)?

The boundary condition command establishes an "FSIN number" for each interface. This interface number can be referenced by all the possible load transfers at that surface.

How do the constant values and array data work in "Edit Property" window in TAS?

In the "Edit Property" panel in TAS, users can either set constant values or array data for some variables. If the users just want to use constant values, they can easily input the...

**** Entered By: jcooper @ 10/02/2007 05:14 PM ****

Q1: Why do the results of the massFlow function differ from an area integration of Density*Velocity?

A1: The difference between the results of massFlow and a summation of Density*Velocity at an interface have to do with the orientation of the interface. If the interface orientation is either curved or not aligned with X, Y, or Z, these evaluations will not match up.


Q2: How can I duplicate the results of the massFlow function so that I can understand what it is doing?

A2: The massFlow function provides the correct evaluation because it takes the projected area normal to the surface at each point to do an integration of Density*Velocity, as follows:

areaInt_x(Velocity u * Density)@ Interface + areaInt_y(Velocity v * Density)@ Interface + areaInt_z(Velocity w * Density)@ Interface 3

This can be matched on an interface or boundary with a known orientation by selecting the orientation before doing the integral. In an expression, use the appropriate velocity component as follows:

Mdot =areaInt(Velocity w*Density )@Out (Surface normal in Z direction)

The massFlow function uses integration point (IP) data on boundaries and interfaces when these are available. IP data is not available in expressions (unless you use the Mass Flow variable, which is again using IP data), so in general, it is not possible to match the accuracy of the built-in CFX massFlow function for surfaces that are curved or whose normals do not align with X, Y or Z.

**** Entered By: jcooper @ 10/02/2007 05:14 PM ****<br><br>Q1: Why do the results of the massFlow function differ from an area integration of Density*Velocity?<br><br>A1:...

When running transient case in TAS, I got the warning message "The computing interval was driven by the defied print interval. This indicates that the model may not have the definition or may be too coarse to accurately predict happenings at that time step. Continue?" What causes this warning message? How can I get rid of this warning message?

This message is just an informative message. There is no problem to run the model after this message.<br><br>When the minimum thermal time constant of the model is larger than the...

I am trying to insert a CFX Pressure in Workbench Simulation 11.0. When I specify the CFX Results file and click Open, I get an error message that says: "A failure has occurred attempting to get information from ... " (the name of a CFX results file follows the dots). What is happening?

This error message has been seen when a license is unavailable for CFX-Post. Check your license server and your Workbench license configuration to make sure your license setup is correct.

I am trying to insert a CFX Pressure in Workbench Simulation 11.0. When I try to import a CFX results file, I get an error message that says a buffer overrun has been detected. What is happening?

This error message has been seen on Windows when the combination of the file name and the path name is very long. Try copying your files to a directory with a shorter name. This has resolved this...

After installing Workbench R11.0 SP1, RSM now gives the error that csh shell is not supported. Is this intended? Is there a fix?

Below is a log of the error:

JobManager Version [Thursday, September 20, 2007 7:31 PM] (10/4/2007 11:02:41 AM)
Job file location: C:TEMPgmfulrjs.gbo. (10/4/2007 11:02:41 AM)
Executing Job on dlphp (localhost). (10/4/2007 11:02:41 AM)
Loading code template C:Program FilesANSYS Incv110RSMConfigxmlServerTestCode_RSH.xml. (10/4/2007 11:02:41AM)
Sending file to server... (10/4/2007 11:02:42 AM)
Starting job script... (10/4/2007 11:02:42 AM)
Server working directory: c:templx3nhzaz.n0c (10/4/2007 11:02:41 AM)
ScriptHost Version [Thursday, September 20, 2007 7:31 PM] (10/4/2007 11:02:42 AM)
Script(s) successfully loaded. (10/4/2007 11:02:43 AM)
Executing Script... (10/4/2007 11:02:43 AM)
Logged on user: ENTa0864467. (10/4/2007 11:02:44 AM)
Testing writability of working directory... (10/4/2007 11:02:44 AM)
Executing command: c:templx3nhzaz.n0ctest.bat (10/4/2007 11:02:44 AM)
Test file contents... (10/4/2007 11:02:44 AM)
c:templx3nhzaz.n0c>type test.out (10/4/2007 11:02:45 AM)
The user who wrote the test file is ENTa0864467 (10/4/2007 11:02:45 AM)
Testing RSH connectivity to (10/4/2007 11:02:46 AM)
=== Output from script === (10/4/2007 11:02:46 AM)
/work/kmecko (10/4/2007 11:02:49 AM)
=== End output from script === (10/4/2007 11:02:50 AM)
Connectivity test successful. (10/4/2007 11:02:50 AM)
Compute proxy shell type determined to be: csh (10/4/2007 11:02:54 AM)
csh Shell is not supported. Terminating Job. (10/4/2007 11:02:54 AM)
Job script Run completed... (10/4/2007 11:02:54 AM)
Script execution completed. (10/4/2007 11:02:55 AM)
Retrieving output files from c:templx3nhzaz.n0c. (10/4/2007 11:02:55 AM)
No matching files found for item: *.out. (10/4/2007 11:02:55 AM)
Job ended normally (10/4/

Q: After installing Workbench R11.0 SP1, RSM now gives the error that csh shell is not supported. Is this intended? Is there a fix?<br><br>Below is a log of the...

After installing ANSYS CFX 11.0 Service Pack 1 on a machine running Windows 2000, starting the Launcher generates the following arror message:

Pearl.exe: Procedure starting point "IsProcessInJob" not found in DLL "KERNEL32.dll"

The service pack for machines running Windows operating systems contains a fix for managing CFX jobs run in batch mode. The fix introduces a call to a procedure which is available in Windows XP but not in Windows 2000.

WORKAROUND:<br>Possible workarounds are:<br><br>- Re-install ANSYS CFX Release 11.0 (and Update 1)<br><br>- Uninstall ANSYS CFX Release 11.0, upgrade the machine...