Question: A straight rectangular fin of length L , thickness t and width W loses heat to the surroundings from its lower and upper surfaces. The

A straight rectangular fin of length L, thickness t and width W loses heat to the surroundings
from its lower and upper surfaces. The heat transfer
coefficient at the upper surface is hu and that of the
lower surface is hL. The ambient fluid is T. At the
base the heat transfer rate is q0. The two side
surfaces and the tip are insulated. Formulate the fin
conduction equation and write the boundary
conditions.
A straight rectangular fin of length L ,

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