Evaluation of thermo-diffusion and diffusion-thermo phenomenon on the reactive micropolar fluid motion over an extending device

Abstract

ABSTRACT The dynamics of thermal-migration and micro-rotation of tiny particles are very essential in thermal engineering to improve the performance of their devices. This has inspired scientists to examine different micro-particles of fluid materials. As such, this article examines thermo-diffusion and diffusion-thermo effects on the motion of hydromagnetic reacting micropolar fluid along an elongated surface with lateral mass flux in porous media. This body of work also presents a report on thermophoretic phenomenon together with viscous dissipation and heat source. The model equations are firstly transformed from partial derivatives to ordinary ones by the use of some similarity quantities and subsequently tracked numerically. The nonlinearity of the involving equations has compelled the use of stable Runge-Kutta-Fehlberg approach with shooting technique to provide the needed solution. To emphasize the influence of the governing parameters impacting the flow fields, variety of graphs have been plotted and discussed qualitatively. Verification of the numerical code with existing data in the literature shows an excellent agreement as checked under limiting conditions. It is evidently shown that the material quantity causes the fluid motion to accelerate, both thermo-diffusion and diffusion-thermo strengthen the heat distribution in the system while the concentration profile declines with chemical reaction.