Abstract
Analytical expressions are developed to describe the transient response of a straight fin when changes occur in the temperature of the surrounding fluid. Initially, the fins may have the temperature of the surrounding fluid or they may be at some steady state. Results are presented for step and sinusoidal changes in the fluid temperature, but it is also shown how to simply extend the model so as to cover the cases when the fin is subjected to linear and higher order changes of fluid temperature. It was shown that the rate of heat removal is not enhanced by subjecting a fin to a periodically changing fluid temperature as opposed to a steady average temperature.
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