eng_103_final_exam_sample_pb_1_txt - 1(Viscous stress 20...

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Unformatted text preview: 1. (Viscous stress --- 20 pts) The viscosity of liquids can be measured through the use of a rotating viscometer of the type illustrated in the figure. In this device the outer cylinder is fixed and the inner cylinder is rotated at a known angular velocity, ω. The torque T required to develop ω is measured and the viscosity, µ, is calculated from these two measurements. Develop an equation relating T, ω, µ, l, Ri, and Ro. Neglect end effects and assume the velocity distribution in the gap is linear. liquid ω, Τ Rotating inner cylinder l Ri Fixed outer cylinder Ro [1] ...
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