Near-wall Mesh Spacing y+ Calculator

This tool calculates the distance required from the wall to the adjacent cell centre to obtain the required dimensionless wall spacing (y+) used in the log-law of the wall functions for the CFD calculations.

Type the required values to get the first cell-wall spacing:

Free Stream Velocity (U, m/s)

Fluid Density (ρf, kg/m3)

Fluid Viscosity (µf, kg/ms)

Reference Length (m)

Required y+

Cell-Wall Spacing (m)

Wall Shear Stress

Reynolds Number