Y plus wall distance estimation
From CFD-Wiki
When meshing it is often useful to be able to estimate the wall-distance needed to obtain a certain Y+ value. To estimate this you can do the following:
1. Compute the Re number:
2. Estimate the skin friction using one of the formulas given here, for example, using the Schlichting skin-friction correlation:
3. Compute the Wall shear stress:
4. Compute the Friction velocity:
5. Compute the wall distance: