INFLUENCE OF THERMO-DIFFUSION AND DIFFUSION-THERMO ON MHD HEAT MASS TRANSFER COUETTE FLOW IN THE PRESENCE BUOYANCY EFFECTS DUE TO RAMPED AND ISOTHERMAL TEMPERATURE

Numerical study was conducted to examine the impacts of Soret and Dufour on MHD Couetteflow heat mass transfer free-convection in vertical channels under the influence of buoyancydistribution effects due to the ramped and isothermal temperature. The coupled non-lineardimensional governing partial differential equations and their initials and boundary conditions ofthe flow were changed to dimensionless form using appropriate dimensionless quantities. Finiteelement method was applied in finding the numerical solutions of the time-dependentmomentum, energy and concentration equations subject to initial and boundary conditions. Theexpressions of velocity, temperature, concentration, skin friction, Nusselt number as well asSherwood were obtained numerically subject to ramped and isothermal temperature. Someselected set graphical results showing the influence of controlling parameters involved in theflow formation were discussed using line graphs. From the results shown it was seen that rise ofRatio of Mass Transfer Parameter N, Porosity Parameter K, Buoyancy Parameter tr, EckertNumber and Dufour Number enhances velocity profile, while the reverse is the case for theincrease of Magnetic Field Parameter M and Prandlt Number Pr. Correspondingly, rise in Ratioof Mass Transfer Parameter, Porosity Parameter K, Buoyancy Parameter tr , Eckert Numberboosts temperature profile and diminishes it with rise in Prandlt Number Pr. Furthermore,concentration profile gets increased with the increase of Schmidt Number Sc. At y=0, the Skinfriction diminishes with the increase of Soret number (Sr) and enhances with the increase inDufour number (). Also, at y=0, the Nusselt Number gets enlarged with the increase of Soretnumber (Sr) and gets diminished with the increase in Dufour number ()