Ericksen Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Ericksen Number

Ericksen number ( \(Er\) ) (dimensionless number) is giving the ratio of the viscous to elastic forces.

Ericksen Number FORMULA

\( Ericksen \; number  \;=\;  \frac { viscosity \;\;x\;\;  velocity \;\;x\;\;   length  } { elasticity } \)

\( Er = \frac { \nu  v  l  } {E} \)

Where:

\(Er\) = Ericksen number

\(\nu\) = viscosity

\(v\) = bulk fluid velocity

\(l\) = length scale

\(E\) = elasticity

 

Tags: Equations for Force