An attempt has been made to investigate the problem of a natural convective radiative flow past an impulsively moving vertical plate with uniform mass and heat flux in the existence of the thermal diffusion effect. The resulting governing equations are solved by the Laplace transform technique in closed form. Effects of radiation, Prandtl number, Soret number, Grashof number, modified Grashof number, and Schmidt number are studied on temperature field, concentration field, velocity field, plate temperature, plate concentration, skin friction, and are demonstrated through graphs. The present study reveals that an intensification of the thermal radiation effect causes a downfall in the fluid temperature, plate temperature, and skin friction, but a contradictory outcome is spotted for plate concentration. One of the significant findings of this study includes that the increasing thermo-diffusion effect hikes the concentration and frictional resistance of the field.
The effect of Dufour on a magnetohydrodynamics (MHD) mixed convection in the presence of radiation absorption and heat sink is performed in this work. The dimensional governing equations involved here are transferred to non‐dimensional form and then solved using perturbation technique. The changes due to the effect of several relevant parameters on the velocity field temperature field and concentration field are graphically displayed. The rates of momentum transfer, heat transfer and mass transfer are also analyzed and their influence due to the related parameters are visualized graphically. Rise in Dufour parameter enhances the fluid velocity and fluid temperature. Also, the heat sink parameter lowers the fluid velocity and temperature. The chemical reactions cause a fall in the fluid's velocity, temperature and concentration.
This study investigated a two-dimensional unsteady MHD-free convection of a viscous, incompressible fluid past through an impulsively started vertical plate in the presence of thermal radiation and chemical reactions. The Laplace transform method is used to solve the second-order partial differential equations. The effect of various related parameters on the velocity field, temperature field, and concentration field are demonstrated graphically. The effects of the Nusselt number, Sherwood number, and skin friction for the influence of different parameters are also graphically visualized. It is noticed that the increment in Soret number hikes the fluid velocity and concentration. Also, the Hartmann number reduces the velocity of the fluid. Present work is important in various industrial and engineering sectors, such as chemical and power industries, glass production, steel rolling etc.
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