Why do you want to use SA in a confined domain? You may want to read up on the various turbulence models, and see what the various limitations are.Â
Your other problem is too great a reliance on y+Â All that tells us is the mesh resolution moving away from the wall. It's not overly useful to show mesh along the wall. Hence we also look at aspect ratio. More reading so you can see why that might be important here. Y+ also doesn't cover farfield resolution: how well resolved are jets in your domain?
You are navigating away from the AIS Discovery experience