HYDROMAGNETIC NATURAL CONVECTION FROM A HORIZONTAL POROUS ANNULUS WITH HEAT GENERATION OR ABSORPTION

This paper deals with a numerical study of free convection in a horizontal cylindrical annulus fi lled with a fl uidsaturated porous medium in the presence of a transverse magnetic fi eld and the heat generation or absorption effect. It is assumed that the inner and outer walls of the cylindrical annulus are maintained at constant temperatures Ti and To , respectively, as Ti > To . In addition to the heat equation, the model consists of the equation of motion under the Darcy law and Boussinesq approximation. The system of equations is solved numerically by the alternatingdirection implicit fi nite difference method. This investigation concerns the effects of the magnetic fi eld inclination angle, Hartmann number, and the heat generation or absorption coeffi cient on heat transfer and the fl ow pattern. The results demonstrate that the heat transfer rate and fl ow regime depend mainly on the characteristics mentioned. The obtained data are presented graphically in terms of the streamlines and isotherms
   
Author:  J. Belabid
Keywords:  free convection, inclined magnetic fi eld, heat generation/absorption, heat transfer, porous medium
Page:  934