Hagen Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Hagen number is a dimensionless number used in forced flow.

FORMULA

\( Hg = \frac { 1  } { \rho} \;  \frac { d p  } { d x} \;   \frac { l^3  } { \nu^2}  \)

Where:

\(Hg\) = Hagen number

\(\rho\) = density

\(\frac { d p  } { d x}\) = pressure gradient

\(l\) = length

\(\nu\) = kinematic viscosity