(Solution) - Pin fins of aluminum are to be compared in terms -(2025 Original AI-Free Solution)

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"Pin fins" of aluminum are to be compared in terms of their relative performance as a function of diameter. Three "pins" having diameters of 2, 5, and 10 mm with a length of 5 cm are exposed to a convection environment with T? = 20ºC, and h = 40 W/m2 ? ºC. The base temperature is 200ºC. Calculate the heat transfer for each pin. How does it vary with pin diameter?