4-Air at 20°C flows through a tube 8 cm dia with a velocity of 9 m/s. The tube wall is at 80°C. Determine for a tube length of 5 m, the exit temperature of air. For the first trial property value taken at 20°C. p = 1.205, v = 15.06 x 10-6 m2/s, Pr = 0.703. k = 0.02593 W/mK, C,= 1005 J/kg K. u = 18.14 x 10-6 kg/ms Nup = 0.023 Ref S Pr"

4-Air at 20°C flows through a tube 8 cm dia with a velocity of 9 m/s. The tube wall is at 80°C. Determine for a tube length of 5 m, the exit temperature of air. For the first trial property value taken at 20°C. p = 1.205, v = 15.06 x 10-6 m2/s, Pr = 0.703. k = 0.02593 W/mK, C,= 1005 J/kg K. u = 18.14 x 10-6 kg/ms Nup = 0.023 Ref S Pr"

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.20P

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