At the end of the meshing log:
Checking faces in error :
non-orthogonality > 75 degrees : 1746
Non-orthongality is usually not a huge concern, because it can be corrected in laplacian and snGrad schemes. But with such a huge amount and not knowing where these faces are located, you may not want to use full correction on laplacian:
Use 0.3333 or 0.5. Somestimes my grid has a few faces with non-orthogonality as high as 80, but a full correction is still stable, probably because those faces are located in low-gradient regions of the flow.
You can also use 1 or 2 non-orthogonal corrections to improve stablity
But remember, the more the correctors, the longer it takes to solve.
Finally, I don’t know why the inlet omega is set to 40-ish ( I guess the inlet value is the initial value because the BC’s on SimScale are packed to save your time ). Based on the given omega, k and nu, the inlet turbulent viscosity ratio nut/nu is like 100, a number not realistic for external aerodynamics at all. You would aim for nut/nu = 1~10 for a wind tunnel validation.