Attributes of Hall current and radiation absorption in unsteady tangent hyperbolic nanofluid flow over a stretching surface with activation energy: A numerical study

Abstract

This work describes the effects of Hall current and radiation absorption on magnetohydrodynamic tangent hyperbolic nanofluid flow over a stretching sheet considering binary chemical reaction with activation energy and heat source. Convective heat is applied to the sheet from the bottom, whereas a zero mass flux condition is imposed on the surface. Furthermore, the radiative heat transfer is considered in view of Rosseland’s approximation. A nonlinear set of ordinary differential equations, in non-dimensional form, is obtained by employing appropriate transformations to the governing equations. The built-in bvp4c function in MATLAB is used to find the numerical solution of the system of ordinary differential equations. A data comparison for a limiting case with previously reported results is presented to validate the numerical findings. Further, the flow, as well as heat and mass transfer characteristics, are shown graphically as a result of the impacts of various flow factors. It is noticed that the fluid flow is accelerated with the rise of the Hall current parameter. The thermophoresis parameter and activation energy have an ascending influence on the concentration profile. Moreover, Biot number and radiation absorption parameter can uplift heat transfer rate. This study has applications in nuclear power reactors, gas turbines, oil reservoirs, reactor safety, and heat insulation.