Case SAE 10W oil D = 12 cm L= 12 cm d =4 cm
Welding: Principles and Applications (MindTap Course List)
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ISBN:9781305494695
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Chapter25: Testing And Inspection
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Problem 10R: How is piping porosity formed?
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Question
A frustum-shaped body is rotating at a constant angular speed of 200 rad/s in a container filled with SAE 10W oil at 20°C (? = 0.100 Pa⋅s), as shown in Fig. 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 input when the oil temperature rises to 80°C (? = 0.0078 Pa⋅s).
![Case
SAE 10W oil
D = 12 cm
L= 12 cm
d =4 cm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe0c9d905-7b67-40c0-9ece-07bb9e4e87f6%2Fafe10aa3-1f66-42ea-9a37-21a1e1134686%2Fkxye9xq.jpeg&w=3840&q=75)
Transcribed Image Text:Case
SAE 10W oil
D = 12 cm
L= 12 cm
d =4 cm
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