Unsteady MHD Mixed Convective Flow of Chemically Reacting and Radiating Couple Stress Fluid in a Porous Medium Between Parallel Plates with Soret and Dufour Effects

摘要

This article attempts to analyze the chemical reaction, Soret and Dufour effects on an incompressible magnetohydrodynamic mixed convection flow of radiating couple stress fluid between parallel porous plates. It is assumed that the flow is generated due to periodic suction or injection at the plates, and the non-uniform temperature and concentration of the plates are assumed to be varying periodically with time. The governing partial differential equations are reduced to nonlinear ordinary differential equations using similarity transformations; then, the resulting equations are solved numerically by the quasilinearization technique. The effects of various fluid and geometric parameters on nondimensional velocity components, temperature distribution, concentration, skin friction, heat and mass transfer rates are discussed in detail through graphs and tables. It is observed that the temperature of the fluid is enhanced, whereas the concentration is decreased with the increasing of Soret and Dufour parameters. Also, it is noticed that the magnetic field and porous medium exhibit the similar effect on velocity components, temperature distribution, and concentration. It has been noticed that the present results have the better agreement with the existing literature.