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Journal of Porous Media
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ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v20.i12.40
pages 1097-1117

THERMAL DIFFUSION AND DIFFUSION THERMO IMPACT ON CHEMICAL REACTED MHD FREE CONVECTION FROM AN IMPULSIVELY STARTED INFINITE VERTICAL PLATE EMBEDDED IN A POROUS MEDIUM USING FEM

G. Jithender Reddy
Department of Mathematics, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, 500090, Telangana State, India
R. Srinivasa Raju
Department of Mathematics, GITAM University, Hyderabad Campus, Rudraram, Medak (Dt), 502329, Telangana State, India
J. Anand Rao
Department of Mathematics, Faculty of Science, Osmania University, Hyderabad, 500007, Telangana State, India

ABSTRAKT

In this paper the influence of thermal diffusion (Soret) and diffusion thermo (Dufour) on an unsteady transient radiative MHD free convective heat transfer of a viscous, incompressible, and electrically conducting fluid past a suddenly started infinite vertical plate embedded in a porous medium is studied with the presence of a chemical reaction. The dimensionless governing, coupled, boundary layer partial differential equations (PDE's) are solved by an efficient finite element method (FEM) for velocity (u), temperature (θ), and concentration (φ) fields with the various thermophysical parameters for externally heating (Gr > 0) and cooling (Gr > 0) of the plate. Also from these computations, local skin friction, and rate of heat and mass transfer coefficients at the plate are obtained. The present results are in good agreement with earlier reported studies using the Laplace transform technique (LTT) and the present results are independent of mesh size.


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