yPlus utility in OpenFOAM
This post is about how to calculate yPlus in OpenFOAM. For RANS Note that yPlusRAS calculates y* and not y+ 1. With wall function; · type ‘yPlusRAS’ for incompressible flow · type ‘yPlusRAS’ –compressible for compressible flow 2. Without wall function; · type wallShearStress if it is incompressible. If not, add " -compressible " flag · calculate manually: sqrt(wallShearStress/rho) * y/nu y = the distance to first cell from the wall nu = kinematic viscosity Be careful: You should use the cell center (height of the cell devided by two) for y For LES type ‘ yPlusLES’ Note: Y-star = rho*Cmu^0.25*sqrt(k)*y/mu y-plus = rho*sqrt(tau_w/rho_w)*y/mu Y-star is related to the turbulent kinetic energy and y-plus to the wall shear ...
Thank you it was so helpful.
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