// Workers AI · dad joke modeWhy was reduced viscosity thick-headed? It had a low resistance to bad ideas.

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 (c). 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.)

See also

• Huggins equation
• Intrinsic viscosity
• Mark–Houwink equation
• Relative viscosity
• Viscosity