Problems converting simpleFoam/motorBike to kOmegaSSTDES

perjorgen · October 21, 2016, 06:58

Hi,

I have had problems finding a working kOmegaSSTDES example, so I tried to modify the simpleFoam/motorBike tutorial to pimpleFoam with kOmegaSSTDES.
After a few iterations the simulation blows up.
What do I do wrong? Shoulld the wall boundary conditions be modified?

Best regards,

Per

perjorgen · October 28, 2016, 08:11

The problem appears to be that kOmegaSSTDES is very sensitive to strong gradients.
I go it to work by slowly ramping up the speed.
The method used in the other motorcycle example with precalculating a static solution as initial value does not seem to work here...

October 21, 2016, 06:58	Problems converting simpleFoam/motorBike to kOmegaSSTDES	#1
perjorgen New Member Per Jørgensen Join Date: Mar 2012 Posts: 20 Rep Power: 14	Hi, I have had problems finding a working kOmegaSSTDES example, so I tried to modify the simpleFoam/motorBike tutorial to pimpleFoam with kOmegaSSTDES. After a few iterations the simulation blows up. What do I do wrong? Shoulld the wall boundary conditions be modified? Best regards, Per

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October 28, 2016, 08:11		#2
perjorgen New Member Per Jørgensen Join Date: Mar 2012 Posts: 20 Rep Power: 14	The problem appears to be that kOmegaSSTDES is very sensitive to strong gradients. I go it to work by slowly ramping up the speed. The method used in the other motorcycle example with precalculating a static solution as initial value does not seem to work here...