The space between two square flat parallel plates is filled with oil. Each side of the plate is 60cm. the thickness of the oil film is 12.5mm, the upper plate, which moves at 2.5 m/s requires a force of 98.1N to maintain the speed. Determine a) the dynamic viscosity in poise, b) the kinematic viscosity of the oil in stokes if the specific gravity of the oil is 0.95.

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.