Froude Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Froude number, abbreviated as Fr, a dimensionless number, is the ratio of inertial force to gravitational force.  It is used for wave and surface behavior for mixed natural and forced convection.

Froude number formula

 $$\large{ Fr = \frac { v } { \sqrt { g \; h_m } } }$$

Where:

$$\large{ Fr }$$ = Froude number

$$\large{ g }$$ = gravitational acceleration

$$\large{ h_m }$$ = mean depth

$$\large{ v }$$ = velocity of flow