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Rough wall at a nonoverlap bc: Solver exited with return code 1

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Old   December 15, 2020, 07:05
Default Rough wall at a nonoverlap bc: Solver exited with return code 1
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Hello everyone,


I am having a problem with simulating a centrifugal compressor with a recirculation device.


I have a rotating impeller domain and a stationary recirculation domain and those two are connected by a frozen rotor interface.

At the impeller shroud, I activated the "Nonoverlap Conditions" and used a Counter Rotating Wall which is smooth. This works just fine.


But as soon as I make it a rough wall and add a Sand Grain Roughness to it, I immediately get the error message "Ansys solver exited with return code 1".

The out-file says the following:



Details of error:-
----------------
Error detected by routine PEEKCS
CDANAM = HOW
CRESLT = NONE

Current Directory : /FLOW/BOUNDCON/ZN1/BCP9/NOVARIABLES/RGH

+--------------------------------------------------------------------+
| Writing crash recovery file |
+--------------------------------------------------------------------+

Details of error:-
----------------
Error detected by routine MAKDAT
CDANAM = LVAR CDTYPE = INTR ISIZE = 174
CRESLT = OLD

Current Directory : /FLOW/ALGORITHM/ZN1/SYSTEM/VARIABLES

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 1. No results file |
| has been created. |
+--------------------------------------------------------------------+

End of solution stage.



Does anyone have an idea what might be the problem?

Thanks and regards,
Jonas
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Old   December 15, 2020, 14:45
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Please attach your output file.
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Old   December 17, 2020, 13:13
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Hello,


Here is the out-file. I replaced some sensible information with ...


Thanks and regards,
Jonas
Attached Files
File Type: txt CFX_001.txt (41.8 KB, 4 views)
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Old   December 17, 2020, 16:47
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The output file shows it crashes just after the monitor points are initialised. It seems to be looking for a variable associated with one of your monitor points and it cannot find it. Check that your monitor points are properly defined and are using the correct variable name (including case).
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Old   December 18, 2020, 10:16
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I have seen the same error in recent releases, and you may have to contact ANSYS CFX support for a temporary workaround.

Do not recall if you need a modified configuration file.
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Old   December 18, 2020, 13:18
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Like 'yplus' versus 'Yplus'
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