Abstract
The research examines the flow and heat transfer of a reactive nanofluid fuelled by magnetohydrodynamics (MHD) boundary layer across an exponential stretch surface paying attention to variable fluid properties. Applying similarity transformations, the Ordinary Differential Equations (PDEs) of governing flow are transformed into nonlinear Ordinary Differential Equations (ODEs), which can be solved by shooting method combined with the Runge–Kutta–Fehlberg (RKF) technique. Buongiorno’s approach is used to model the nanofluid dynamics, which contains three categories of chemical reactions namely Arrhenius (zero-order), bimolecular, and sensitized reactions. The results gives new quantitative data such as influence of variable fluid properties which affected the velocity, temperature, and concentration profiles. Namely, velocity falls due to rising variable viscosity, whereas temperature increases when the conductivity is raised. As variable diffusion parameter increases, the concentration profile also increases. In all cases of set chemical reactions, larger magnitudes of δ lead to reduction in concentration whereas magnitudes of β lead to increment in concentration. Moreover, the skin friction coefficient, local Nusselt number and the local Sherwood number are calculated in a variety of parameters and give knowledge about the influence of the anchor fluid property variation on the surface phenomena. The findings of the research may be applied to energy through cooling systems of high-performance electronics and power sources, in reactor technology and in catalysis where heat transfer, fluid mechanics and precise manipulation of concentration of reactive species are highly desirable.