Nonlinear heat transfer in rectangular fins and exact solutions with temperature dependent properties

It is aimed to present general exact solution formulae valid for the nonlinear heat transfer of fin problems in this paper. although some analytical solutions were previously worked out for temperature dependent thermal conductivity and heat transfer coefficients,they are shown to be inadequate in some cases. the presented formulas enable us to better understand the physical properties of interest in terms of the fin base heat transfer rate as well as fin efficiency and fin tip temperature. © 2015 tibtd printed in turkey.