Question: A 6 cm wide and a 6 cm high vertical hot surface in 40 C air is to be cooled by a heat sink

A 6 cm wide and a 6 cm high vertical hot surface

A 6 cm wide and a 6 cm high vertical hot surface in 40 C air is to be cooled by a heat sink with equally spaced fins of square profile. The fins are .1 cm thick and 6 cm long in the vertical direction and have a height of 12 cm from the base. Determine the optimum fin spacing and the rate of heat transfer by natural convection. Base temperature 140 C.

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