Relative Viscosity

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Relative viscosity, abbreviated $$\eta_r$$, is the ratio of the viscosity of a solution to the viscosity of a solution used.

Relative Viscosity Formula

$$\large{ \eta_r = \frac {\eta} {\eta_s} }$$

Where:

$$\large{ \eta_r }$$  (Greek symbol eta) = relative viscosity

$$\large{ \eta }$$  (Greek symbol eta) = viscosity of a solution

$$\large{ \eta_s }$$  (Greek symbol eta) = viscosity of a solution used