Hydraulic Radius of a Rectangular Channel

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

hydraulic radius of a rectangle 2Hydraulic radius, abbreviated as \(r_h\), is the area cross-section of water in a pipe or channel divided by the wetting perimeter.

 

Hydraulic Radius of a Rectangular Channel formula

\(\large{ r_h =  \frac{  w \;h }{ w \;+\; 2\;h }   }\) 

Where:

 Units English Metric
\(\large{ r_h }\) = hydraulic radius \(\large{ ft }\) \(\large{ m }\)
\(\large{ h }\) = depth of fluid \(\large{ ft }\) \(\large{ m }\)
\(\large{ w }\) = width of fluid \(\large{ ft }\) \(\large{ m }\)
\(\large{ P_w }\) = wetting perimeter \(\large{ ft }\) \(\large{ m }\)

 

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Tags: Hydraulic Equations