12.13.13 Solving the $k$ Equation to Obtain Wall Boundary Conditions

In the RSM, ANSYS FLUENT, by default, uses the explicit setting of boundary conditions for the Reynolds stresses near the walls, with the values computed with this equation (in the separate Theory Guide). The turbulent kinetic energy, $k$, is calculated by solving the $k$ equation obtained by summing this equation (in the separate Theory Guide) for normal stresses. To disable this option and use the wall boundary conditions given in this equation (in the separate Theory Guide), turn off the Wall BC from k Equation under the Reynolds-Stress Options in the Viscous Model dialog box.

This option will not appear unless you have activated the Reynolds Stress model.