Air at 25°C flows at 50 × 10-6 kg/s within 100-mm-long channels used to cool a high thermal conductivity metal mold. Assume theflow is hydrodynamically and thermally fully developed.Air, Tmi = 25°CMold, T=50°C-Case ACase B(a) Determine the rate of heat transferred, in W, to the air for a circular channel (D =(case A).10 mm) when the mold temperature is 50°C(b) Consider air flowing under the same conditions as in case A, except now the channel is segmented into six smaller triangularsections. The flow area of case A is equal to the total flow area of case B. Determine the rate of heat transferred, in W, to the air for thesegmented channel.(c) Determine the pressure drops for cases A and B, both in Pa.

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Answered: Air at 25°C flows at 50 × 10-6 kg/s…

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.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.54P

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