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Kinematic Viscosity


Viscosity is a concept where fluid shows struggle against flowing, which is being distorted due to extensional stress forces or shear stress. Kinematic viscosity is the sort which is computed by calculating the ratio of the fluid mass density to the dynamic fluid, viscosity or absolute fluid viscosity. It is from time to time known as momentum diffusivity. The units of kinematic viscosity are established on time and area. It is the ratio of the area of time; henceforth it is m22/s or ft22/s.

The kinematic viscosity formula is articulated by,

ν = μρ

Where, μ is dynamic or absolute viscosity,

ρ is the density

Kinematic Viscosity Solved Problems

Underneath are some of the solved questions based on Kinematic Viscosity:

Problem 1: The absolute viscosity of a flowing fluid is 0.67 Ns/m22, if the density is 10 kg/m33. Calculate its kinematic viscosity.

Known: Absolute viscosity νν = 0.67 Ns/m22, density ρρ = 10 kg/m33.

The kinematic viscosity is given by,


Therefore the kinetic viscosity is 0.067m2/s

Problem 2: Calculate the density of fluid having an absolute viscosity of 0.89 Ns/m22 and kinematic viscosity of 2 m22/s.

Known: Absolute viscosity μμ = 0.89 Ns/m22, kinematic viscosity νν = 2 m22/s.

The density is given by,

p= 0.445kg/m3

Therefore, the density of fluid is 0.445kg/m3