Wall modelling

- Note
*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:

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

where

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

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

Copyright © 2017 OpenCFD Ltd.