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Closed Conduit Hydraulics - Hazen Williams Equation

Hazen-Williams can be used to determine the flow characteristics in closed conduits (pipe systems).

For Velocity

 V = 1.318CR^{0.63}S^{0.54} \text{  (US)}

 V = 0.849CR^{0.63}S^{0.54} \text{  (SI)}

S = slope, in decimal form. This is equivalent to  h_f/L

R = hydraulic radius, \text{(Area of flow)}/\text{(wetted perimeter)}

C = Roughness Coefficient, get this from a table (available in both the AIO and CERM) Click here to continue reading