Convergence issues

fluiddynamicsyay · June 25, 2019, 12:09

Hello again! I am trying to run the hypersonic double cone case as a test (mesh attached), but SU2 diverges before displaying any iterations. The error it returns is:

Error in "void CIntegration::Convergence_Monitoring(CGeometry *, CConfig *, unsigned long, double, unsigned short)":
-------------------------------------------------------------------------
SU2 has diverged (NaN detected).
------------------------------ Error Exit -------------------------------

Full output is attached. What could be causing this?
Mesh and CFG: https://drive.google.com/file/d/1TC4...ew?usp=sharing

wallym · June 25, 2019, 13:36

I cant access your cfg/mesh files from where I am.

However, an instant divergence could suggest a few problems (not in any order of likelihood):
1.) Something is set incorrectly in preprocessing/SetNondimensional routines
2.) The mesh has some issues
3.) The numerical scheme has issues at large mach numbers.

I would suggest turning off multigrid to start. If you could post a .txt file of the config (not through google docs), I could take a look.

Best,
Wally

fluiddynamicsyay · June 27, 2019, 14:49

I got it to work, thanks for the help!

angupraveen · September 17, 2019, 04:21

could you tell me what the problem was?

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June 25, 2019, 13:36		#2
wallym Senior Member Wally Maier Join Date: Apr 2019 Posts: 123 Rep Power: 7	I cant access your cfg/mesh files from where I am. However, an instant divergence could suggest a few problems (not in any order of likelihood): 1.) Something is set incorrectly in preprocessing/SetNondimensional routines 2.) The mesh has some issues 3.) The numerical scheme has issues at large mach numbers. I would suggest turning off multigrid to start. If you could post a .txt file of the config (not through google docs), I could take a look. Best, Wally

June 27, 2019, 14:49		#3
fluiddynamicsyay New Member Join Date: Jun 2019 Posts: 4 Rep Power: 7	I got it to work, thanks for the help!

September 17, 2019, 04:21		#4
angupraveen New Member Angu Praveen Join Date: May 2019 Posts: 14 Rep Power: 7	could you tell me what the problem was?