Hazen-Williams Flow through an Open Channel Equation

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 flow through an open channel Equation

\( v = k \;C \; r_h^{0.63}\; m^{0.54}  \) 
Symbol English Metric
\( v \) = mean flow velocity \(ft\;/\;sec\) \(m\;/\;s\)
\( k \) = conversion factor   \(dimensionless \)
\( C \) = Hazen-Williams coefficient   \( dimensionless \)
\( m \) = hydraulic grade line slope \( ft \) \(m \)
\( r_h \) = hydraulic radius \( ft \) \( m \)

 

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Tags: Flow Open Channel Hazen-Williams