Laplace Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Laplace Number

 Laplace number ( \(La\) ) (also called Suratman number \(Su\) ) (dimensionless number) is used in the charcaterization of free surface fluid dynamics.  It is a ratio of surface tension to the momentum transport inside a fluid.

Laplace Number Formula

\( La =  \frac { \sigma \rho l } { \nu^2 }  \)


\(La\) = Laplace number

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

\(\rho\) (Greek symbol rho) = density

\(l\) = length

\(\nu\) (Greek symbol nu) = viscosity of the liquid


Tags: Equations for Fluid