Title: Unsteady MHD stagnation-point flow with heat and mass transfer for a three-dimensional porous body in the presence of heat generation/absorption and chemical reaction

Authors: Ali J. Chamkha; Sameh E. Ahmed

Addresses: Manufacturing Engineering Department, The Public Authority for Applied Education and Training, Shuweikh 70654, Kuwait. ' Faculty of Sciences, Department of Mathematics, South Valley University, Qena, Egypt

Abstract: The problem of unsteady Magnetohydrodynamic (MHD) flow with heat and mass transfer near the stagnation point of a three-dimensional (3D) porous body in the presence of heat source/sink and chemical reaction effect has been studied numerically using an efficient iterative implicit finite-difference method. The numerical results are validated by favourable comparisons with previously published work. Three forms for the free stream velocity distributions namely a constantly accelerating flow, a periodic fluctuating flow and an exponentially decelerating flow are considered. Numerical results for the velocity components in the x-and y-directions, temperature distribution and concentration distribution as well as the skin-friction coefficients and the Nusselt and Sherwood numbers are presented graphically for various parametric conditions and discussed.

Keywords: mixed convection; three-dimensional flow; 3D flow; stagnation point; heat source; heat sink; chemical reaction; magnetohydrodynamics; unsteady MHD flow; heat transfer; mass transfer; porous bodies; finite difference method.

DOI: 10.1504/PCFD.2011.042848

Progress in Computational Fluid Dynamics, An International Journal, 2011 Vol.11 No.6, pp.388 - 396

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 06 Oct 2011 *

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