I found out I could just map the yPlus [point data] directly on the surface of the results faces (turning internal mesh and bounding boxes off on its Property Panel). Then I just adjusted the scale to show a good range (the auto range was a max of ~18 which made the whole wing in the blue range).
Here are the yPlus values for the Bottom and Top of the wing:
The average is probably just around 1.0. It seems yPlus is directly related to the total thickness of the 5 layers created.
- To increase that to 30, would I just change expansion ratio to 1.3 times the 5th root of (30/1.0) or 2.57?
- Or should I try to get that to 160 (~halfway between 30 and 300) which would take an expansion ratio of 3.59?
- Why does the yPlus go smaller at the spanwise panel joints, is that because there are smaller mesh sizes there.
- If so, why would smaller mesh sizes mean a thinner boundary layer? Intuitively I would not think boundary layer thickness had anything to do with mesh size, more with pressure and air speed at the location on the surface…