Elasticity Number

Elasticity number, abbreviated as El, a dimensionless number, is the ratio of elastic force to internal force in viscoelastic flow.

 

Elasticity Number formula

\(\large{ El = \frac { t \; \eta} { \rho \; r^2 } }\)

Where:

\(\large{ El }\) = elasticity number

\(\large{ \rho }\)   (Greek symbol rho) = density

\(\large{ r }\) = pipe radius

\(\large{ t }\) = relaxation time

\(\large{ \eta }\)  (Greek symbol eta) = viscosity