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Dufour Effect on Unsteady MHD Free-Convective Flow of a Dissipative Fluid Past a Vertical Porous Plate

Koragiri Srihari

Department of Mathematics, MGIT, Gandipet, Hyderabad-500075, Telangana State, INDIA. e-mail: kotagirisrihari@yahoo.com  

ABSTRACT

       In the present paper a numerical attempt is made to analyze the effect of Dufour number variation in the presence of viscous dissipation, on unsteady free convection flow of a electrically conducting, viscous fluid past an infinite vertical porous plate embedded in porous medium. A transverse magnetic field is applied normal to the flow. The governing non-linear coupled partial differential equations with boundary conditions are solved using Crank-Nicholson method, for which a numerical code is executed by C-Program. Graphical results for velocity, temperature and concentration fields and tabular values of Skin-friction and Nusselt numbers are presented and discussed. It is found that the velocity and Temperature ,Skin–friction and Nusselt number are observed to be increasing in the presence of viscous dissipation and for  the increasing values of Dufour number.

Key words:  MHD Flow; Vertical Plate; Dufour, viscous dissipation, , Crank-Nicholson method.

 

 

 

 

 

 

International eJournal of Mathematics and Engineering
Volume
5, Issue
4, Pages:  2478 - 2489