Combined performance of non-linear thermal radiation and chemical reaction on MHD convective heat and mass transfer of a micropolar fluid over a non-isothermal surface

Abstract

A numerical model has been developed to study the laminar double diffusive natural convection of a micropolar fluid over a vertical permeable semi-infinite plate embedded in a uniform porous medium in the presence of non-linear thermal radiation. The problem is solved by using Runge–Kutta–Fehlberg method with shooting technique. The influence of thermal buoyancy ratio, Schmidt number, chemical reaction parameter, etc. on the fluid velocity, microrotation, temperature and solute concentration has been analysed. It is found that the profiles of velocity, microrotation and temperature increase with enhancement in the heat generation/absorption parameter whereas reverse effect is observed on the concentration distribution. Further, the presence of microrotation material parameter is to increase the velocity, temperature and concentration profiles but the microrotation profiles retard.

Keywords:

• Double diffusive convection
• stretching sheet
• magnetohydrodynamics
• thermal radiation
• micropolar fluid

Disclosure statement

No potential conflict of interest was reported by the authors.