MHD stagnation point flow of Fe3O4/Cu/Ag-CH3OH nanofluid along a convectively heated stretching sheet with partial slip and activation energy: Numerical and statistical approach

Abstract

In this study, we have explored the influences of nonlinear thermal radiation and heat generation on MHD stagnation point flow of methanol (CH3OH)-based nanofluid along a permeable stretching sheet embedded in a porous regime. The impacts of viscous dissipation, velocity slip, convective boundary condition, thermophoresis, activation energy, concentration slip and binary chemical reaction are also taken into account. The nanoparticles considered in the present study are Fe3O4, Cu and Ag. The governing partial differential equations are then transformed into a system of coupled ordinary differential equations by the application of appropriate similarity variables. A shooting technique based on the Runge-Kutta-Fehlberg method is implemented to tackle the dimensionless set of equations. The impacts of various characterizing parameters on nanofluid velocity, temperature and concentration profiles are determined and analyzed via graphs. Moreover, the computed values of the quantities of engineering interest (local skin friction, Nusselt and Sherwood numbers) are presented in tabular form and discussed. The quadratic regression analysis estimation for local surface drag coefficient, local heat and mass transfer rates are also presented through tables. This work may find its significant applications in high temperature and cooling processes, space technology, paints, medicines, conductive coatings, cosmetics, bio-sensors, and to name a few.