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Air at 60oC and 1 atm enters a smooth tube having a diameter of 2 cm...

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Mechanical Engineering

Air at 60oC and 1 atm enters a smooth tube having a diameter of2 cm and length of 10 cm. The air velocity is 40 m/s: 1- Whatconstant heat flux must be applied at the tube surface to result inan air temperature rise of 5oC? 2- What average wall temperaturewould be necessary for this case?

Answer: (1) qs = 11841W/m2    (2) Tw = 97oC

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