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.)