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Effect of turbulence on pressure driven flow

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Old   January 24, 2016, 20:25
Default Effect of turbulence on pressure driven flow
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Nihar
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Hi Everyone

I have been trying to run a compressible steady state simulation for pressure driven flow over a flow bench. It's a RANS simulation and I have been using the kEpsilon model. The issue is that the simulation blows up when I run with the turbulence model but runs fine and converges when I turn it off. Same thing happens no matter which turbulent model I choose. The mesh is fine as the same problem happens when I run the simulation on a simple cylindrical geometry with the same boundary conditions. I am not sure why the turbulence solver is having an issue with the pressure boundary conditions.
I have attached the boundary conditions and numerical schemes for my case. Any help will be welcome.
Thanks.
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Old   January 26, 2016, 18:35
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Nihar
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If I use the converged solution (for no turbulence case) as an initial solution and run with turbulence on it still diverges after a couple of iterations. Any suggestions foamers?
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