"Error in subroutine GETCORE": simulation of an turbine and reynolds stress models

nikn · July 9, 2015, 10:11

Hello,
currently I am simulating an axial turbine with a pretty fine mesh (roughly about 23 million nodes and yplus below 1). The simulation is steady-state.
I used SST as turbulence model and had no difficulties with this simulation. As I want to compare these results with the Reynolds Stress models, I changed the turbulence model both to BSL Reynolds Stress and SSG Reynolds Stress model in CFX pre. I used the solution I got with SST as initial values.

Now my question: Both simulations failed to initialize and the .out-file shows the following error:

Error in subroutine GETCORE :
Oper=GRADIENT What=VEL_FL1 Where=VERTICES When=TSTEP0/LAST Action=RETURN
GETVAR originally called by subroutine CAL_RS_ICS

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

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver could not be started, or exited with return |
| code 255. No results file has been created. |
+--------------------------------------------------------------------+

End of solution stage.

Unfortunately I have no idea what that means and I hope that you can help me. If you need further information, just let me know. Its my first post in this forum

Furthermore: do you have general advice for simulations with Reynolds stress models? I assume that I have to change more than just the setting "turbulence model" in CFX pre when I want to get results with Reynolds Stress.

Cheers
Niklas

ghorrocks · July 9, 2015, 18:55

Check the initial condition and boundary tabs after changing to RSM. There may be additional parameters you need to enter.

nikn · July 11, 2015, 05:38

hey,
thanks for your reply

ok, I checked it, but honestly I have no idea, what to change.

I changed in every domain in the initialization tab the turbulence from 5% intensity to "Reynolds stresses and epsilon", but nothing changed and I got the same error...
Do I have to change the inlet and outlet boundary conditions as well to Reynolds stresses and epsilon?

So could you specify the error or tell me more exactly which settings I must choose?

Unfortunately modelling with RSM doesnt seem to be very common because I cant find that much in the cfx modelling guide

ghorrocks · July 11, 2015, 06:22

No, RSM modelling is not common. Few applications require it.

CFX-Pre will show you the parameters which need updating. If CFX-Pre says nothing then you should be good to go.

nikn · July 11, 2015, 13:35

ok, but cfd pre said nothing, but I still got this error message.

Cant anyone say something about the error? Do you think that Ansys support might have an idea?

ghorrocks · July 12, 2015, 06:05

CFX has many very cryptic error messages. You have to guess what they mean half the time.

You could try ANSYS support.

Or you could try a few things to understand it a little more. If you start a RSM simulation with no result file as an initial condition (use one defined in the CCL) does it start OK?

fjtb · April 25, 2018, 20:17

Hi! Sorry for bringing this thread up again, but I just want to ask how did you solve this problem? I'm getting the exact same error. Thanks!

ghorrocks · April 25, 2018, 21:05

Have you tried the suggestions in this thread?

kjgrzywnowicz · October 30, 2019, 15:32

Hello everyone, I would like to post my solution to the reported problem.

I was simulating flow of an incompressible fluid through part of some throttling element. The same error, which was observed by Niklas, was caused in my case by my serious mistake in the setup: basically, setting at the inlet the mass flow rate of roughly 5000 kg/s, I have set the pressure of domain of 1 atm. When I changed the reference pressure of the fluid domain to the realistic (expected) value, everything worked fine.

So, if anyone gets similar error, first, look for some seriously dummy setting somewhere within fundamental physics of your setup.

Regards

July 9, 2015, 10:11	"Error in subroutine GETCORE": simulation of an turbine and reynolds stress models	#1
nikn New Member Join Date: Jul 2015 Posts: 4 Rep Power: 10	Hello, currently I am simulating an axial turbine with a pretty fine mesh (roughly about 23 million nodes and yplus below 1). The simulation is steady-state. I used SST as turbulence model and had no difficulties with this simulation. As I want to compare these results with the Reynolds Stress models, I changed the turbulence model both to BSL Reynolds Stress and SSG Reynolds Stress model in CFX pre. I used the solution I got with SST as initial values. Now my question: Both simulations failed to initialize and the .out-file shows the following error: Error in subroutine GETCORE : Oper=GRADIENT What=VEL_FL1 Where=VERTICES When=TSTEP0/LAST Action=RETURN GETVAR originally called by subroutine CAL_RS_ICS +--------------------------------------------------------------------+ \| ERROR #001100279 has occurred in subroutine ErrAction. \| \| Message: \| \| Stopped in routine GV_ERROR \| \| \| \| \| \| \| \| \| \| \| +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ \| An error has occurred in cfx5solve: \| \| \| \| The ANSYS CFX solver could not be started, or exited with return \| \| code 255. No results file has been created. \| +--------------------------------------------------------------------+ End of solution stage. Unfortunately I have no idea what that means and I hope that you can help me. If you need further information, just let me know. Its my first post in this forum Furthermore: do you have general advice for simulations with Reynolds stress models? I assume that I have to change more than just the setting "turbulence model" in CFX pre when I want to get results with Reynolds Stress. Cheers Niklas

April 25, 2018, 21:05		#8
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have you tried the suggestions in this thread? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

July 9, 2015, 18:55		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Check the initial condition and boundary tabs after changing to RSM. There may be additional parameters you need to enter.

July 11, 2015, 05:38		#3
nikn New Member Join Date: Jul 2015 Posts: 4 Rep Power: 10	hey, thanks for your reply ok, I checked it, but honestly I have no idea, what to change. I changed in every domain in the initialization tab the turbulence from 5% intensity to "Reynolds stresses and epsilon", but nothing changed and I got the same error... Do I have to change the inlet and outlet boundary conditions as well to Reynolds stresses and epsilon? So could you specify the error or tell me more exactly which settings I must choose? Unfortunately modelling with RSM doesnt seem to be very common because I cant find that much in the cfx modelling guide

July 11, 2015, 06:22		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	No, RSM modelling is not common. Few applications require it. CFX-Pre will show you the parameters which need updating. If CFX-Pre says nothing then you should be good to go.

July 11, 2015, 13:35		#5
nikn New Member Join Date: Jul 2015 Posts: 4 Rep Power: 10	ok, but cfd pre said nothing, but I still got this error message. Cant anyone say something about the error? Do you think that Ansys support might have an idea?

July 12, 2015, 06:05		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	CFX has many very cryptic error messages. You have to guess what they mean half the time. You could try ANSYS support. Or you could try a few things to understand it a little more. If you start a RSM simulation with no result file as an initial condition (use one defined in the CCL) does it start OK?

April 25, 2018, 20:17		#7
fjtb New Member Francis Jenner T. Bernales Join Date: Apr 2018 Posts: 9 Rep Power: 8	Hi! Sorry for bringing this thread up again, but I just want to ask how did you solve this problem? I'm getting the exact same error. Thanks!

October 30, 2019, 15:32		#9
kjgrzywnowicz New Member Join Date: Oct 2019 Posts: 2 Rep Power: 0	Hello everyone, I would like to post my solution to the reported problem. I was simulating flow of an incompressible fluid through part of some throttling element. The same error, which was observed by Niklas, was caused in my case by my serious mistake in the setup: basically, setting at the inlet the mass flow rate of roughly 5000 kg/s, I have set the pressure of domain of 1 atm. When I changed the reference pressure of the fluid domain to the realistic (expected) value, everything worked fine. So, if anyone gets similar error, first, look for some seriously dummy setting somewhere within fundamental physics of your setup. Regards