Ohnesorge Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Ohnesorge number is a dimensionless number that relates the viscous force to inertial forces and surface tension forces.

FORMULA

\(Oh = \frac {\mu}  {\sqrt { \rho \sigma l } } \)

\(Oh = \frac {\sqrt { We } } { Re } \)

Where:

\(Oh\) = Ohnesorge number

\(\mu\) (Greek symbol mu) = viscosity

\(\rho\) (Greek symbol rho) = density

\(l\) = characteristic length

\(\sigma\) (Greek symbol sigma) = surface tension

\(We\) = Weber number

\(Re\) = Reynolds number

 

Tags: Equations for Force