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 filled with a fluidsaturated porous medium in the presence of a transverse magnetic field 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 T_i > T_o. 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 finite difference method. This investigation concerns the effects of the magnetic field inclination angle, Hartmann number, and the heat generation or absorption coefficient on heat transfer and the flow pattern. The results demonstrate that the heat transfer rate and flow regime depend mainly on the characteristics mentioned. The obtained data are presented graphically in terms of the streamlines and isotherms.
Автор:  Belabid J.
Ключевые слова:  free convection, inclined magnetic field, heat generation/absorption, heat transfer, porous medium
Стр:  960-965