Effects of radiation and chemical reaction on MHD flow past a vertical plate with variable temperature and mass diffusion

Abstract

This research investigates the effects of radiation, chemical reaction and porosity of the medium on unsteady flow of a viscous, incompressible and electrically conducting fluid past an exponentially accelerated vertical plate with variable wall temperature and mass diffusion in the presence of transversely applied uniform magnetic field. The plate temperature and the concentration level near the plate increase linearly with time. The fluid model under consideration has been solved by Laplace transform technique. The model contains equations of motion, diffusion equation and equation of energy. To analyze the solution of the model, reasonable sets of the values of the parameters have been considered. The numerical data obtained is discussed with the help of graphs and tables. The numerical values obtained for skin-friction, Sherwood number and Nusselt number have been tabulated. It is found that the velocity of fluid increases when the values of permeability parameter, acceleration parameter and radiation parameter are increased. But trend is reversed with the chemical reaction parameter. It means that the velocity decreases when the chemical reaction parameter is increased.

Natural convective flow past a suddenly started vertical plate with uniform mass and heat flux in the presence of radiation, thermal diffusion

“…In consideration of this, many authors have studied the problems of convective flow with thermal radiation during the last decades. Ogulu and Makinde, 10 Seth et al, 11,12 Ahmed and Bordoloi, 13 Cess, 14 Chamkha, 15 Rajput and Kumar 16–18 and others are among them. Recently, Rajput and Kumar 19 investigated the effect of heat absorption on magnetohydrodynamics flow over a plate with variable wall temperature.…”

Thermal radiation and Joule heating effects on a magnetohydrodynamic Casson nanofluid flow in the presence of chemical reaction through a non-linear inclined porous stretching sheet

“…Sharma and Saboo (2017) discussed the heat and mass transfer with viscous dissipation in horizontal channel partially occupied by porous medium in the presence of oscillatory suction. Effect of radiation and chemical reaction on MHD flow past a vertical plate with variable temperature and mass diffusion was studied by Rajput and Gaurav Kumar (2019). Bala Anki Reddy (2016) studied the effect of MHD boundary layer slip flow of a Casson fluid over an exponentially stretching surface in the presence of thermal radiation and chemical reaction.…”

Heat and mass transfer effect on a radiative second grade MHD flow in a porous medium over a stretching sheet

“…Sahoo et al have studied the effect of heat source and chemical reaction on MHD flow past a vertical plate subject to a constant motion with variable temperature and concentration. Rajput and Kumar (2019) have analysed theoretically the effects of radiation, chemical reaction and porosity of the medium on unsteady flow of a viscous, incompressible and electrically conducting fluid past an exponentially accelerated vertical plate with variable wall temperature and mass diffusion in the presence of transversely applied uniform magnetic field. They have obtained the results which claim to have applications in the research related to the solar physics dealing with the sunspot development, the structure of rotating magnetic stars, cooling of electronic components of a nuclear reactors etc.…”