Question

Froude number depends upon_________

(a) Flow velocity, external field and characteristic length

(b) Flow velocity and mass

(c) Mass flow rate and volume

(d) Characteristic length and volume

I had been asked this question in quiz.

This key question is from Navier-Stokes Equations of Motion topic in section Fluid Dynamics of Fluid Mechanics

Answer 1

Right choice is (a) Flow velocity, external field and characteristic length

The best I can explain: The Froude number is a dimensionless number. It is defined as the ratio of flow inertia to the external field.  The Froude number is based on the speed-length ratio.