This lesson covers the principles of rotational viscometers, specifically focusing on the transport phenomena of non-Newtonian fluids. It delves into the working principles of concentric cylinder rheometers, explaining how to calculate shear stress and shear rate. The lesson also discusses the importance of the gap between the inner and outer cylinder in determining the curvature effect. It further explains how to measure normal stresses in Couette flow or concentric cylinder geometry. The lesson concludes with an example problem demonstrating how to obtain shear stress and shear rate data for a food product using a cone and plate geometry.

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