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

Richardson number

From CFD-Wiki

(Difference between revisions)
Jump to: navigation, search

Revision as of 18:07, 20 September 2005

In the stability of continuously stratified parallel shear flows the ratio of (the squares of) the buoyancy frequency to the background velocity gradient is known as the (gradient) Richardson number.


Ri = \frac{N^2}{U_z^2}



N = \mbox{Buoyancy frequncy} = -\frac{g}{\rho_0} \frac{\partial \bar{\rho}}{\partial z}

Here  \rho_0 is the reference density and  \bar{\rho} is the background density field.

My wiki