Determine the convection heat transfer coefficient (in W/m2-K) for air flowing at a velocity of 8 m/s in a 10-cm diameter and 10-m long tube. Air enters the tube at 30°C and leaves at 20°C, i.e. air is cooled. Take the property of air at 1 atm and assume flow to be fully developed.

Elements Of Electromagnetics
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Determine the convection heat transfer coefficient (in W/m2-K) for air flowing at a velocity of 8
m/s in a 10-cm diameter and 10-m long tube. Air enters the tube at 30°C and leaves at 20°C, i.e.
air is cooled. Take the property of air at 1 atm and assume flow to be fully developed.
For air at 1 atm:
Temperature
k, W/m-K
v, m?/s
Pr
15°C
0.02476
1.470x10-5
0.7323
20°C
0.02514
1.516x10-5
0.7309
25°C
0.02551
1.562x10-5
0.7296
Hint: When the fluid temperature changes, we use its properties at mean temperature, unless otherwise
specified.
Round your answer to 2 decimal places.
Add vour answer
Transcribed Image Text:Determine the convection heat transfer coefficient (in W/m2-K) for air flowing at a velocity of 8 m/s in a 10-cm diameter and 10-m long tube. Air enters the tube at 30°C and leaves at 20°C, i.e. air is cooled. Take the property of air at 1 atm and assume flow to be fully developed. For air at 1 atm: Temperature k, W/m-K v, m?/s Pr 15°C 0.02476 1.470x10-5 0.7323 20°C 0.02514 1.516x10-5 0.7309 25°C 0.02551 1.562x10-5 0.7296 Hint: When the fluid temperature changes, we use its properties at mean temperature, unless otherwise specified. Round your answer to 2 decimal places. Add vour answer
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