Solver Error Code 2, but why this time?

engineering_beginner · November 23, 2015, 13:34

Hey,

I am doing a quite easy project for my university, which
is simulating 3 different fluids (newtonian, shear thinning, shear thickening) in an easy geometry at 5 diffent flow speeds (0.1 / 0.5 / 1 / 2 / 5 m/s).

You can see the structure in workbench from the screenshot.
CFX 14 and CFX 15 are not working (error code 2), but all the others work fine.

CFX 1-5 is newtonian fluid
CFX 6-10 is shear thinning
CFX 11-15 is shear thickening

The flow speeds are increasing from left to right (CFX 1 is 0.1 m/s and CFX 5 is 5 m/s).

The second screenshot show the fluid data of CFX 15 and the geometry.

(language of the workbench is on german).
ergebnisse = results // lösung = solution // Netz = mesh

Why do I get error code 2 and why only for CFX 14 and CFX 15?

I tried to change turbolence model from first order to high resolution, but no change.

Thank you!

ghorrocks · November 23, 2015, 16:12

You need to look in the output file of the failed runs. You get more detailed error messages there.

-Maxim- · November 24, 2015, 04:31

I had this error before when the solver ran out of memory. But to be sure, you should post the out-file or at least the last part with the error message.

do you have a finer mesh with your cases 14 and 15?

engineering_beginner · November 24, 2015, 04:48

I solved it:

it was this error:

ERROR #002100004 has occurred in subroutine Out_Scales_Flu.
Message:
The Reynolds number is outside of the range expected based on the
Option selected for the TURBULENCE MODEL. Check this setting,
the values of the properties, mesh scale, consistency of units
and solution values in the input file. Execution will proceed.

and I just switched to a different turbolence model.

Thank you for you help

But I have another question. Why do I get viscosity pictures like that (which tell me nothing) on CFX 13-CFX15 ?

ghorrocks · November 24, 2015, 06:15

The turbulence thing is a warning, not an error. The solver will proceed even when this message is displayed. Something else caused your crash.

Regarding your plot of turbulence viscosity: Doesn't it tell you exactly what is happening about the turbulent viscosity? You have a region of high turbulent viscosity right at the inlet as you probably defined an inlet turbulence condition with high turbulence but high dissipation as well. So the turbulence dissipates very quickly. And the rest of your domain does not generate much turbulence in comparison. Your plot seems to show exactly what is going on to me.

November 23, 2015, 13:34	Solver Error Code 2, but why this time?	#1
engineering_beginner New Member Stephan Join Date: Sep 2015 Posts: 4 Rep Power: 10	Hey, I am doing a quite easy project for my university, which is simulating 3 different fluids (newtonian, shear thinning, shear thickening) in an easy geometry at 5 diffent flow speeds (0.1 / 0.5 / 1 / 2 / 5 m/s). You can see the structure in workbench from the screenshot. CFX 14 and CFX 15 are not working (error code 2), but all the others work fine. CFX 1-5 is newtonian fluid CFX 6-10 is shear thinning CFX 11-15 is shear thickening The flow speeds are increasing from left to right (CFX 1 is 0.1 m/s and CFX 5 is 5 m/s). The second screenshot show the fluid data of CFX 15 and the geometry. (language of the workbench is on german). ergebnisse = results // lösung = solution // Netz = mesh Why do I get error code 2 and why only for CFX 14 and CFX 15? I tried to change turbolence model from first order to high resolution, but no change. Thank you!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
simpleFoam error - "Floating point exception"	mbcx4jc2	OpenFOAM Running, Solving & CFD	12	August 4, 2015 02:20
AMI interDyMFoam for mixer nu problem	danny123	OpenFOAM Programming & Development	8	September 6, 2013 02:34
same geometry,structured and unstructured mesh,different behaviour.	sharonyue	OpenFOAM Running, Solving & CFD	13	January 2, 2013 22:40
plot over time	fferroni	OpenFOAM Post-Processing	7	June 8, 2012 07:56
calculation diverge after continue to run	zhajingjing	OpenFOAM	0	April 28, 2010 04:35

November 23, 2015, 16:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	You need to look in the output file of the failed runs. You get more detailed error messages there.

November 24, 2015, 04:31		#3
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 415 Rep Power: 12	I had this error before when the solver ran out of memory. But to be sure, you should post the out-file or at least the last part with the error message. do you have a finer mesh with your cases 14 and 15?

November 24, 2015, 04:48		#4
engineering_beginner New Member Stephan Join Date: Sep 2015 Posts: 4 Rep Power: 10	I solved it: it was this error: ERROR #002100004 has occurred in subroutine Out_Scales_Flu. Message: The Reynolds number is outside of the range expected based on the Option selected for the TURBULENCE MODEL. Check this setting, the values of the properties, mesh scale, consistency of units and solution values in the input file. Execution will proceed. and I just switched to a different turbolence model. Thank you for you help But I have another question. Why do I get viscosity pictures like that (which tell me nothing) on CFX 13-CFX15 ?

November 24, 2015, 06:15		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	The turbulence thing is a warning, not an error. The solver will proceed even when this message is displayed. Something else caused your crash. Regarding your plot of turbulence viscosity: Doesn't it tell you exactly what is happening about the turbulent viscosity? You have a region of high turbulent viscosity right at the inlet as you probably defined an inlet turbulence condition with high turbulence but high dissipation as well. So the turbulence dissipates very quickly. And the rest of your domain does not generate much turbulence in comparison. Your plot seems to show exactly what is going on to me.