Hello NikoBiele and thank you for ur response, I have tried a lot of different combinations of meshes, discretization schemes, and expressions to estimate k and omega, but the problem is that none of those expressions give good results, so the thing that I did is take note of the bounding values displayed on my screen and use a average as my initial guess ( This makes everything more stable and I reach convergence in a reasonable amount of time ), the big problem is that the principal dimension of the wake zone seems to reduce for a semicilinder as the Reynolds numbers goes up ( this is totally different for my other geometries for the bluff body in which the length of the wake seems to go up as I turn the Reynolds number Up), sorry if I'm not very clear and thank you again for the help provided.