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#1 |
New Member
Avijeet
Join Date: Nov 2012
Posts: 18
Rep Power: 13 ![]() |
I was using SU2 to run some simulations on the ONERA M6 wing. The standard transonic test case (M~=0.84) converged fairly quickly and produced results that were well in agreement with the validation results.
Problem occurred when I tried to simulate a low subsonic flow (M=0.25) over the same wing. SU2 won't converge no matter how low I set the CFL. I wanted to ask are there any known issues with SU2 at low mach numbers for 3D flows? Few details regarding my simulation: Solver = RANS, SA turbulence model 0.25 Mach, Compressible flow |
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#2 |
Member
Amit
Join Date: May 2013
Posts: 85
Rep Power: 13 ![]() |
I would recommend you to try -
CONV_NUM_METHOD_FLOW= AUSMPLUSUP or SLAU. Switch off the multigrid if it is on - MGLEVEL= 0 Also add - USE_ACCURATE_FLUX_JACOBIANS= YES You can try constant CFL initially (5, 10 or whatever works) and see if it goes through...... |
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Tags |
case setup, divergence issue, subsonic flow |
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