Froude Number

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
\(\large{ Fr =  \frac{ v }{ \sqrt { g \; h_m }  }  }\)
Symbol	English	Metric
\(\large{ Fr  }\) = Froude number	\(\large{dimensionless}\)
\(\large{ g  }\) = gravitational acceleration	\(\large{ \frac{ft}{sec^2}}\)	\(\large{ \frac{m}{s^2}}\)
\(\large{ h_m }\) = mean depth	\(\large{ft}\)	\(\large{m}\)
\(\large{ v  }\) = velocity of flow	\(\large{ \frac{ft}{sec}}\)	\(\large{ \frac{m}{s}}\)

 

Froude number calculator