Newton's law of viscosity and Newtonian fluids

Newton’s law
of viscosity is given by





Ƭ = µ du/dy



Where,



Ƭ = shear stress.

µ = absolute or dynamic viscosity.

du/dy = velocity gradient.

Newtonian fluids:
Fluids which follow this law are known as Newtonian fluids.

Example of Newtonian fluids
are Air, water etc.

But non Newtonian fluids
are tar, paste, blood, glycerin etc.