CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Wiki > Friction velocity

Friction velocity

From CFD-Wiki

Jump to: navigation, search

Dimensional analysis shows that at a wall a charateristic velocity, called the friction velocity, u_*, can be defined in the following way:

u_* \equiv \sqrt{\frac{\tau_w}{\rho}}

Where \tau_w is the wall shear stress and \rho is the fluid density at the wall.

My wiki