Influence of chemical reaction on MHD couple stress nanoliquid flow over a bidirectional stretched sheet

Abstract

A mathematical model has been established to study the effect of heat source on magnetohydrodynamic 3D chemically reacting couple stress nanofluid flow generated due to the stretching surface. The flow of the fluid in this analysis is controlled by the effects of Brownian motion and thermophoresis force on the temperature and concentration boundary. Zero nanoparticle mass flux condition is employed at the surface, which specifies that the nanoparticles fraction are submissively measured. The systems of partial differential equations translated into dimensionless expressions by using suitable similarity functions and are then evaluated computationally (by utilising MATLAB). The influence of different physical parameters on the flow variables is displayed graphically and discussed. It is reviled that the thermal and species boundary layer thickness of the liquid is enhanced due to the rising values of thermal radiation $\left(2\le R_d\le 8\right)$ and heat generation $\left(0.1\le H\le 0.4\right)$. On the other hand rate of heat transfer and skin-friction coefficient are shown reverse trend with the increase of couple stress values $\left(0.1\le K\le 0.4\right)$. The outcomes of present work are matched with the results available in the literature and are found to approve very closely as a limiting case.

KEYWORDS:

• MHD
• chemical reaction
• heat source
• couple stress
• nonlinear thermal radiation

Disclosure statement

No potential conflict of interest was reported by the author(s).