Is there relationship between wall roughness and sand grain height, and what will be sand grain height if we know wall roughness Ra 0.59?

Hello, I am studying the effect of wall roughness on particle transport using CFD "Ansys". I have the wall roughness Ra=0.55, 0.73, what should I put or use in wall boundary condition for sand...

03 March 2022 1,580 1 View