Open Access Nano Idea

Mixed convective boundary layer flow over a vertical wedge embedded in a porous medium saturated with a nanofluid: Natural Convection Dominated Regime

Rama Subba Reddy Gorla1*, Ali Jawad Chamkha2 and Ahmed Mohamed Rashad34

Author Affiliations

1 Cleveland State University, Cleveland, OH 44115 USA

2 Manufacturing Engineering Department, The Public Authority for Applied Education and Training, Shuweikh 70654, Kuwait

3 Department of Mathematics, Taibah University, Faculty of Science, Al Madina Al Munawara, Saudi Arabia

4 Department of Mathematics, South Valley University, Faculty of science, Aswan, Egypt

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Nanoscale Research Letters 2011, 6:207  doi:10.1186/1556-276X-6-207

Published: 9 March 2011

Abstract

A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid. The governing partial differential equations are transformed into a set of non-similar equations and solved numerically by an efficient, implicit, iterative, finite-difference method. A parametric study illustrating the influence of various physical parameters is performed. Numerical results for the velocity, temperature, and nanoparticles volume fraction profiles, as well as the friction factor, surface heat and mass transfer rates have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt, and Lewis number Le. The dependency of the friction factor, surface heat transfer rate (Nusselt number), and mass transfer rate (Sherwood number) on these parameters has been discussed.