A frustum-shaped body is rotating at a constant angularspeed of 200 rad/s in a container filled with SAE 10W oil at 20°C (u = 0.1 Pa.s), as shown. If the thickeness of the oil film on all sides is 1.2 mm, determine the power required to maintain this motion. Also determine the reduction power input when the oil temperature rises to 80°C (u = 0.0078 Pa.s) Case SAE 10W oil D= 12 cm L= 12 cm d=4 cm

A frustum-shaped body is rotating at a constant angularspeed of 200 rad/s in a container filled with SAE 10W oil at 20°C (u = 0.1 Pa.s), as shown. If the thickeness of the oil film on all sides is 1.2 mm, determine the power required to maintain this motion. Also determine the reduction power input when the oil temperature rises to 80°C (u = 0.0078 Pa.s) Case SAE 10W oil D= 12 cm L= 12 cm d=4 cm

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

A frustum-shaped body is rotating at a constant
angularspeed of 200 rad/s in a container filled with SAE
10W oil at 20°C (u = 0.1 Pa.s), as shown. If the thickeness
of the oil film on all sides is 1.2 mm, determine the power
required to maintain this motion. Also determine the
reduction power input when the oil temperature rises to
80°C (u = 0.0078 Pa.s)
Case
SAE 10W oil
D= 12 cm
L= 12 cm
d =4 cm

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