Two cylinders of 80 cm in length are fitted together. The outside diameter of the inner cylinder is
15 cm and a gap of 1mm exist between both cylinders. The inner cylinder rotates 250 rpm. Find
the velocity of the cylinder. If the oil fills the clearance has a relative density of 0.81 and viscosity
of 0.31 kg/ms, find the torque and viscous force.
Use: v = Π d N
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The viscosity of a fluid is to be measured by an viscometer constructed of two 75–cm–long concentric cylinders. The outer diameter of the inner cylinder is 15 cm, and the gap between the two cylinders is 0.12 cm. The inner cylinder is rotated at 200 rpm, and the torque is measured to be 0.8 N-m.
Explanation:
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