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Solution divergence when running turbulent flows (SimFlow)

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Old   May 23, 2019, 16:43
Default Solution divergence when running turbulent flows (SimFlow)
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Matheus Garros
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Hello, I am a Brazilian student and I using SimFlow to do a simulation with a rotating cylinder. I simulate in laminar flow, and the solution converges well and the results are nice. But I want to add roughness to the cylinder, so I choose RANS and Realizable k-e model (pisoFoam), but when I try to run, the solution diverges. I would like to know, what I need to configure to have sucess in the solution, Thank you very much for any help.
The only change I do in the turbulence parameters were in the cylinder wall, I choose Rough Wall Function (k), and put the heigh of my choice, and the constant I selected 0.5, because I read that's for a uniform roughness.
Here are my simflow/openfoam files.
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openfoam, rans, realizable k-epsilon, simflow

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