Cell culture media is flowing through a cylindrical tube at a volumetric flow rate of 12 ml/s. The tube has a diameter of 0.8 cm and length of 12cm. Assume the viscosity of the media is 1.2 cP (0.0012 Pa s). a. What is the shear rate at the wall of the tube ? b. What is the shear rate at the centerline of the tube ? c. What is the shear stress at the wall of the tube ?

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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.