A fluid sample is contained between two parallel plates separated by a distance of 2+- 0,1mm . The area of the plates is 100+- 0,01 cm². The bottom plate is stationary, and the top plate moves at a velocity of 1 cm/s when a force of 315+- 25 dynes is applied to it, and at 5 cm/s when a force of 1650+- 25 dynes is applied. (a) What is the viscosity of this fluid? (b) What is the rheological behavior of this fluid and discussing this behavior?

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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.