Table of Contents
Journal of Industrial Mathematics
Volume 2015 (2015), Article ID 895046, 10 pages
http://dx.doi.org/10.1155/2015/895046
Research Article

Entropy Analysis for MHD Generalised Couette Flow in a Composite Duct

Department of Mathematics, University of Rajasthan, Jaipur 302004, India

Received 31 July 2014; Revised 8 January 2015; Accepted 17 February 2015

Academic Editor: Stoyan Nedeltchev

Copyright © 2015 Paresh Vyas and Ashutosh Ranjan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents entropy analysis of electrically conducting Newtonian fluid flow inside a horizontal composite duct. The upper impermeable wall of the duct moves with a uniform velocity while the lower wall is porous strata of finite thickness with impermeable bottom. The upper wall and the impermeable bottom are at constant temperature but at different temperatures. The duct is divided into two regions: Region I of clear fluid and Region II of fluid saturated porous layer. Momentum and thermal regimes for clear and porous regions are matched at clear fluid-porous interface by employing suitable matching conditions. The governing equations are solved analytically. Analytical solutions obtained for velocity and temperature are utilized to compute entropy generation. The effects of pertinent parameter on temperature distribution, entropy generation, and Bejan number are portrayed graphically and discussed.