Question 4: Consider a sphere with a diameter of 25 mm and a surface temperature of 60°C that is immersed in a fluid at a temperature of 30°C and a velocity of 2 m/s. Calculate the drag force and the heat rate when the fluid is (a) water and (b) air at atmospheric pressure. Explain why the results for the two fluids are so different.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Question 4: Consider a sphere with a diameter of 25 mm and a surface temperature of 60°C that is
immersed in a fluid at a temperature of 30°C and a velocity of 2 m/s. Calculate the drag force and the
heat rate when the fluid is (a) water and (b) air at atmospheric pressure. Explain why the results for
the two fluids are so different.
Transcribed Image Text:Question 4: Consider a sphere with a diameter of 25 mm and a surface temperature of 60°C that is immersed in a fluid at a temperature of 30°C and a velocity of 2 m/s. Calculate the drag force and the heat rate when the fluid is (a) water and (b) air at atmospheric pressure. Explain why the results for the two fluids are so different.
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