Froude Number

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

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



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Tags: Flow Equations Gravity Equations Force Equations Open Channel Equations