Transient hydromagnetic three-dimensional natural convection from an inclined stretching permeable surface

The problem of transient, laminar, three-dimensional natural convection flo w over an inclined permeable surface in the presence of a magnetic field an d heat generation or absorption effects is considered. The order of the gov erning differential equations for this investigation is reduced by using tr ansient non-similar transformations. The resulting initial-value problem is solved numerically by an accurate, implicit, finite-difference line by lin e marching scheme. A parametric study is performed to illustrate the influe nce of the Prandtl number, Hartmann number, heat generation or absorption c oefficient, and the surface suction or injection parameter on the velocity and temperature fields as well as the transient development of the skin-fri ction coefficients and the Nusselt number. These results are displayed grap hically to show special aspects of this flow and heat transfer situation. ( C) 2000 Elsevier Science S.A. All rights reserved.