Error in subroutine FNDVAR

magnec · July 28, 2009, 09:05

Hi there, I saw somebody also met similar error but there was no answer

CFX 11.0, the error occurs at the first step when applying Reynolds Stress model (BSL) in a cavitation problem, regardless of choosing a initial results file or not:

Error in subroutine FNDVAR :
Error finding variable VISCEFF
GETVAR originally called by subroutine ASS_STRESS

ERROR #001100279 has occurred in subroutine ErrAction.
Message:
Stopped in routine GV_ERROR

The non-cavitating computation has no problem when there is only one material of water. I also tried to add the vapor material in the non-cavitating computation but this error still occured.

Thanks for the help~

ghorrocks · July 28, 2009, 09:51

Reynolds Stress model AND cavitation? You really like tough ones, don't you! Have you tried using a simpler turbulence model? I bet it works if you use SST or any of the 2 equation models. I don't think you will find many people have used RSM with cavitation so you are probably in untested territory...

I suspect this is a bug in CFX - you are using an old version, maybe it is fixed in V12. If it still occurs in V12 I would report it as a bug.

Glenn Horrocks

magnec · July 28, 2009, 22:48

Hi, Glenn

Yes, i have already tried some simpler model like k-e, k-Omega and SST and results were got. but these models do not have a good performance on unsteady behavier, quite different from the experiment.

Anyway, i will try in CFX 12.0. Thank you!

ghorrocks · July 28, 2009, 23:46

Hi,

The two-equation turbulence models and RSM all use Reynolds averaging and therefore handle the transient aspect of turbulence the same way. The only reason to use RSM models is because your turbulence is anisotropic.

If you need better transient accuracy than the 2-equation models you should go to SAS, DES or LES.

Glenn Horrocks

July 28, 2009, 09:05	Error in subroutine FNDVAR	#1
magnec New Member magnec Join Date: Jul 2009 Posts: 2 Rep Power: 0	Hi there, I saw somebody also met similar error but there was no answer CFX 11.0, the error occurs at the first step when applying Reynolds Stress model (BSL) in a cavitation problem, regardless of choosing a initial results file or not: Error in subroutine FNDVAR : Error finding variable VISCEFF GETVAR originally called by subroutine ASS_STRESS ERROR #001100279 has occurred in subroutine ErrAction. Message: Stopped in routine GV_ERROR The non-cavitating computation has no problem when there is only one material of water. I also tried to add the vapor material in the non-cavitating computation but this error still occured. Thanks for the help~

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July 28, 2009, 09:51		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Reynolds Stress model AND cavitation? You really like tough ones, don't you! Have you tried using a simpler turbulence model? I bet it works if you use SST or any of the 2 equation models. I don't think you will find many people have used RSM with cavitation so you are probably in untested territory... I suspect this is a bug in CFX - you are using an old version, maybe it is fixed in V12. If it still occurs in V12 I would report it as a bug. Glenn Horrocks

July 28, 2009, 22:48		#3
magnec New Member magnec Join Date: Jul 2009 Posts: 2 Rep Power: 0	Hi, Glenn Yes, i have already tried some simpler model like k-e, k-Omega and SST and results were got. but these models do not have a good performance on unsteady behavier, quite different from the experiment. Anyway, i will try in CFX 12.0. Thank you!

July 28, 2009, 23:46		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Hi, The two-equation turbulence models and RSM all use Reynolds averaging and therefore handle the transient aspect of turbulence the same way. The only reason to use RSM models is because your turbulence is anisotropic. If you need better transient accuracy than the 2-equation models you should go to SAS, DES or LES. Glenn Horrocks