Hazen-Williams Equation Flow through an Open Channel

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Hazen-Williams method is only valid for water flowing at ambient temperatures, the Darcy-Weisbach method should be used for other liquids or gases. The Hazen-Williams Equation can be used for flow through an open channel or through a pressurized pipe.

Hazen-Williams Equation flow through an open channel formula

$$\large{ v = k C r^{0.63} m^{0.54} }$$

Where:

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

$$\large{ k }$$ = conversion factor

$$\large{ C }$$ = Hazen-Williams Coefficient

$$\large{ m }$$ = hydraulic grade line slope

$$\large{ r }$$ = hydraulic radius