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• Makinde, O
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Entropy 2012, 14(6), 1028-1044; doi:10.3390/e14061028

Article

Combined Effect of Buoyancy Force and Navier Slip on Entropy Generation in a Vertical Porous Channel

Adetayo Samuel Eegunjobi*  and Oluwole Daniel Makinde

Institute for Advance Research in Mathematical Modelling and Computation, Cape Peninsula University of Technology, P.O. Box 1906, Bellville 7535, South Africa

* Author to whom correspondence should be addressed.

Received: 18 May 2012; in revised form: 2 June 2012 / Accepted: 2 June 2012 / Published: 12 June 2012

Download PDF Full-Text [881 KB, uploaded 12 June 2012 10:37 CEST]

Abstract: In this paper, we investigate the combined effects of buoyancy force and Navier slip on the entropy generation rate in a vertical porous channel with wall suction/injection. The nonlinear model problem is tackled numerically using Runge–Kutta–Fehlberg method with shooting technique. Both the velocity and temperature profiles are obtained and utilized to compute the entropy generation number. The effects of slip parameter, Brinkmann number, the Peclet number and suction/injection Reynolds number on the fluid velocity, temperature profile, Nusselt number, entropy generation rate and Bejan number are depicted graphically and discussed quantitatively.

Keywords: buoyancy force; Navier slip; porous channel; suction/injection; entropy generation; irreversibility

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