A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to an atmospheric airstream having a velocity of 40 m/s. The air is at a temperature of 20 °C, while the plat is maintained at Ts = 120 °C. The airflows over the top and bottom surfaces of the plate, and measurement of the drag force reveals a value of 0.075 N. What is the rate of heat transfer from both sides of the plate to the air? Properties: Air (70 °C): p = 1.018 kg/m³, cp = 1009 J/Kg K, Pr = 0.70, v = 20.22×10-6 m²/s. 4-40m/s Too =20°C p=1atm = 0.2m 0.2m -T=120°C -=0.075 N

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Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.49P
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Please use the Chilton-Colburn analogy when solving.

A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to an atmospheric airstream having
a velocity of 40 m/s. The air is at a temperature of 20 °C, while the plat is maintained at Ts = 120 °C.
The airflows over the top and bottom surfaces of the plate, and measurement of the drag force reveals
a value of 0.075 N. What is the rate of heat transfer from both sides of the plate to the air? Properties:
Air (70 °C): p = 1.018 kg/m³, cp = 1009 J/Kg K, Pr = 0.70, v = 20.22×10-6 m²/s.
4-40m/s
Too =20°C
p=1atm
= 0.2m
0.2m
-T=120°C
-=0.075 N
Transcribed Image Text:A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to an atmospheric airstream having a velocity of 40 m/s. The air is at a temperature of 20 °C, while the plat is maintained at Ts = 120 °C. The airflows over the top and bottom surfaces of the plate, and measurement of the drag force reveals a value of 0.075 N. What is the rate of heat transfer from both sides of the plate to the air? Properties: Air (70 °C): p = 1.018 kg/m³, cp = 1009 J/Kg K, Pr = 0.70, v = 20.22×10-6 m²/s. 4-40m/s Too =20°C p=1atm = 0.2m 0.2m -T=120°C -=0.075 N
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