Redwood Viscometer No. 2
Aim
To determine the kinematic viscosity and absolute viscosity of the given thick sample of oil (highly viscous) at various temperatures and to study the variations of viscosity with temperature by using Redwood viscometer No. 2.
Principle
Viscosity is the property of a liquid by virtue of which it offers resistance to its own flow. The viscosity of liquids decreases with increasing temperature. The rate at which the viscosity changes with temperature is known as viscosity index.
VI = 
× 100
where VI = viscosity index
U = viscosity at 100°F of the oil under test
L = viscosity at 100°F of the low-viscosity standard ...
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