Air (1 atm) entered into a 5-mm-diameter circular tube at an average velocity of 5 m/s. The tube wall is maintained at a constant surface temperature. Determine the convection heat transfer coefficient for (a) a 10-cm-long tube and (b) a 50-cm-long tube. Evaluate the air properties at 50°C.

Air (1 atm) entered into a 5-mm-diameter circular tube at an average velocity of 5 m/s. The tube wall is maintained at a constant surface temperature. Determine the convection heat transfer coefficient for (a) a 10-cm-long tube and (b) a 50-cm-long tube. Evaluate the air properties at 50°C.

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 7.38P

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Question

Air (1 atm) entered into a 5-mm-diameter circular
tube at an average velocity of 5 m/s. The tube wall is maintained
at a constant surface temperature. Determine the convection
heat transfer coefficient for (a) a 10-cm-long tube and
(b) a 50-cm-long tube. Evaluate the air properties at 50°C.

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