A computational study has been performed to make a computational analysis of natural convection and entropy generation in a sharp edged finned cavity. Three dimensional analysis has been done by solving governing equations with a written computational code in Fortran. The study is performed for fin inclination angles from À60°to 60°, Ra = 10 5 , Pr = 0.7, R c (conductivities ratio) changes from 0.01 to 100 and irreversibility coefficient is taken as u ¼ 10 À5 . It is observed that higher values

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... of thermal conductivity ratio (Rc P 1) do not affect entropy generation due to heat transfer and Bejan number. Ó 2016 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).