Numerical assessment of mixed convection flow of Walters-B nanofluid over a stretching surface with Newtonian heating and mass transfer

Abstract

The existing research investigates the numerical solution of a mixed convection flow of Walters-B nanofluid over a stretching sheet with Newtonian heating and mass transfer subject to the availability of magnetic field and mass suction. The impact of thermal radiation and chemical reaction with the Newtonian heat and mass transfer is conducted in detail. Also, the effects of nanoparticles are analyzed via considering the Brownian and thermophoresis motion. By utilizing similarity transformations, the relevant nonlinear governing equations with corresponding boundary conditions are modified to coupled nonlinear ordinary differential equations. These transformed coupled nonlinear ordinary differential equations are then solved numerically by providing the numerical approach bvp4c in MATLAB. The influence of multiple values of emerging parameters is studied by providing some graphs and tables with the consideration of both assisting and opposing flow regions. It is observed that the buoyancy parameter decays the velocity boundary layer thickness for assisting flow and the reverse trend is observed for opposing flow, as well as the viscoelasticity of nanofluid and Hartman number gradually reduces the boundary layer thickness. Further, the viscoelasticity parameter results in boosting the skin friction coefficient for both assisting and opposing flows whereas the Brownian and the thermophoresis motion have a reducing effect on the Nusselt number and Sherwood number enhances with the improvement of radiation parameter.