Reduced viscosity
# Reduced viscosity

In fluid dynamics, the reduced viscosity of a polymer is the ratio of the relative viscosity increment ($\eta _{i}$) to the mass concentration of the species of interest. It has units of volume per unit mass.

The reduced viscosity is given by:

    ${\frac {\eta _{i}}{c}}$

where $\eta _{i}$ is the relative viscosity increment given by $\eta _{i}={\frac {\eta -\eta _{s}}{\eta _{s}}}$ (Where $\eta _{s}$ is the viscosity of the solvent.)

