Wednesday, March 09, 2016

Define dynamic viscosity & Kinematic viscosity

Dynamic Viscosity

Viscosity is defined as the property of fluid which offers resistance to the movement of one layer of fluid over another adjacent layer of the fluid.

du δ = μ --------- dy

 μ – dynamic viscosity or viscosity or coefficient of viscosity

(N-s/m 2 ) 1 N-s/m2 = 1 Pa-s = 10 Poise

Kinematic Viscosity

It is defined as the ratio between the dynamic viscosity and density of fluid.

ν = μ/ρ (m2 /s) 1 m 2 /s = 10000 Stokes (or) 1 stoke = 10-4 m 2 /s 

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