[CFDBro]

Hello everyone, I am a beginner to OpenFOAM and RANS in general and was having some troubles with convergence with my case. My files are attached in the archive.

I see that my residuals converge nicely for the first one thousand odd iterations (you can look at the plot I have attached too) but around iteration 2000 pressure residuals start growing. I feel like it may be an issue with numerics as explored here:

SimpleFoam convergence problems

and I am trying different combinations of schemes. Otherwise I am puzzled and would appreciate any suggestions.

Thanks

P.S. Case files attached (without the mesh but I can mail that to you if needed). I have also attached a checkMesh output.

Edit: Grammar


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Some more information

I am using a k-omega-sst model with yplus values around 5-10 (I know this is a bit high for low Re models) but they are in the vicinity of walls that are not really important. Could this be an issue?