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Influence of double stratification on MHD free convection with Soret and Dufour effects in a Darcian porous media
Author(s) -
Tak S.S.,
Lodha Arti
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200701112
Subject(s) - nusselt number , natural convection , sherwood number , porous medium , mass transfer , stratification (seeds) , magnetohydrodynamics , mechanics , thermodynamics , mass flux , partial differential equation , similarity solution , ordinary differential equation , thermophoresis , convection , heat transfer , physics , chemistry , porosity , magnetic field , mathematics , differential equation , mathematical analysis , boundary layer , turbulence , reynolds number , biology , germination , quantum mechanics , nanofluid , organic chemistry , seed dormancy , botany , dormancy
The heat and mass transfer characteristics of natural convection about a vertical surface embedded in a doubly stratified saturated porous medium subjected to a magnetic field is studied, taking into account the Dufour and Soret effects. It is found that the similarity solution exists for the case of uniform surface heat and mass flux conditions when the thermal and solutal stratification of the medium are assumed to have power function form x 1/3 . The resulting set of ordinary coupled nonlinear differential equations is solved numerically using shooting technique. Nusselt and Sherwood numbers are tabulated for various values of the involved parameters. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)