Air at 27C and a velocity of 5 m/s passes over the
Chapter 7, Problem 7.53(choose chapter or problem)
Air at 27?C and a velocity of 5 m/s passes over the smallregion As(20 mm20 mm) on a large surface, which ismaintained at Ts?127?C. For these conditions, 0.5 Wis removed from the surface As. To increase the heatremoval rate, a stainless steel (AISI 304) pin fin ofdiameter 5 mm is affixed to As, which is assumed toremain at Ts?127?C (a) Determine the maximum possible heat removal ratethrough the fin.(b) What fin length would provide a close approxima-tion to the heat rate found in part (a)? Hint: Refer toExample 3.9.(c) Determine the fin effectiveness, ?f.(d) What is the percentage increase in the heat ratefrom Asdue to installation of the fin?
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