What Is a Wall Law?

A wall law is a mathematical description of mean flow quantities, such as velocity, temperature and species concentration, in turbulent boundary layers. The most basic wall laws apply only to equilibrium situations, although some attempts have been made to extend wall laws to include non-equilibrium effects.

Two types of wall laws are used in STAR-CCM+:

The wall laws are not user-selectable, but have been chosen based on the behavior of the turbulence model. Turbulence models that contain damping functions (or behave as if they do) will typically use blended wall laws in their all- wall treatment. The standard wall law is generally used with high- wall treatments.