Wall modelling

Table of Contents

Under construction - please check again later


Momentum wall functions are imposed by setting the turbulence viscosity at the wall. By combining the dimensionless velocity

\[ u^+ = \frac{u}{u_t} \]

dimensionless wall distance

\[ y^+ = \frac{\rho y u_t}{\mu} \]

and friction velocity

\[ u_t = \sqrt {\frac{\tau_{wall}}{\rho}} \]

the wall shear stress can be described according to:

\[ \tau_{wall} = \mu \frac{y^+}{u^+} \frac{u}{y} = (\mu + \mu_t) \frac{u}{y} \]


\[ \mu_t = \mu\left(\frac{y^+}{u^+} - 1\right) \]

High Reynolds number

Would you like to suggest an improvement to this page? Create an issue

Copyright © 2017 OpenCFD Ltd.

Licensed under the Creative Commons License BY-NC-ND Creative Commons License