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:
![C_f = [ 2 \, log_{10}(Re_x) - 0.65 ] ^{-2.3} \quad \mbox{for} \quad Re_x < 10^9](/W/images/math/c/a/4/ca4dc895c55260e9f9244eb0465141c8.png)
3. Compute the Wall shear stress:
4. Compute the Friction velocity:
5. Compute the wall distance:
