Question: A frustum-shaped body is rotating at a constant angular speed of 170 rad/s in a container filled with SAE 10W oil at 20C (p

A frustum-shaped body is rotating at a constant angular speed of 170

A frustum-shaped body is rotating at a constant angular speed of 170 rad/s in a container filled with SAE 10W oil at 20C (p = 0.100 Pa-s), as shown in the figure. If the thickness of the oil film on all sides is 1.2 mm, determine the power required to maintain this motion. Also determine the reduction in the required power when the oil temperature rises to 80C (u= 0.0078 Pas). Case SAE 10W oil D= 12 cm L= 12 cm d = 4 cm The power required to maintain this motion is W. The reduction in the required power input when the oil temperature is raised to 80C is W.

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