Q13-1 Wall Functions for Turbulent Heat Transfer Modeling with CFD

K. J. Farrell

Computational fluid dynamics solutions of the Reynolds-averaged Navier-Stokes equations often employ wall functions to capture the behavior of the near-wall boundary layer flow without excessive grid refinement. While the applicability of these functions has strong support from physical reasoning and dimensional arguments, they are nonetheless empirical. In this article, we review the universal velocity and temperature boundary layer profiles that form the bases of the wall functions.