Simultaneous heat and mass transfer from a permeable sphere at uniform heat and mass fluxes with magnetic field and radiation effects

摘要

The problem of coupled heat and mass transfer by natural convection from a permeable sphere in the presence of an external magnetic field and thermal radiation effects is formulated. The sphere surface is maintained at a constant heat and mass fluxes and is permeable to allow for possible fluid wall suction or blowing. The resulting governing equations are nondimensionalized and transformed into a nonsimilar form and then solved numerically by an implicit, iterative, finite-difference method. Comparisons with previously published work are performed and excellent agreement is obtained. A parametric study of the physical parameters is conducted and a representative set of numerical results for the velocity, temperature, and concentration profiles as well as the local skin-friction coefficient, local wall temperature, and local wall concentration is illustrated graphically to show interesting features of the solutions.