The Froude number (Fr) is a dimensionless quantity used in fluid mechanics to describe the behavior of a fluid flow around an object or within a channel. The Froude number is defined as the ratio of the flow velocity (V) to the square root of the product of the gravitational acceleration (g) and a characteristic length or chord length (c) of the flow.Â
- Fr = Froude number (dimensionless)
- V = Flow velocity (in m/s or ft/s)
- g = Acceleration due to gravity (in m/s² or ft/s²)
- c = Characteristic length or chord length (in meters or feet)