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Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 25 m/s, while the surface of the sphere is maintained at 75°C.
(a) What is the drag force on the sphere?
(b) What is the rate of heat transfer from the sphere?
(c) Generate a plot of the heat transfer from the sphere as a function of the air velocity for the range 1 to 25 m/s.
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In a cold winter day, wind blows over the wall of a house at 40 km/h. The outside air temperature is reported to be -7°C. The wall is 8 m long and 5 m height whose surface temperature is 10 °C.
What problems would this cause (if any), and what are some of the ways that these problems could be addressed? How would (if at all) MRP help you when other methods might not?
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