Evaluation of heat and mass transfer characteristics in a nanofluid flow over an exponentially stretchable sheet with activation energy

Abstract

The current study explores the impact of heat source/sink on the flow of nanofluid across an exponentially stretchable sheet with the suspension of TiO2 as nanoparticle in base liquid water. Furthermore, activation energy, Newtonian heating and porous medium are accounted in the modelling. The modelling equations are transformed into a system of ordinary differential equations (ODEs) using similarity transformations. To solve these equations numerically, the Runge Kutta Fehlberg 45 (RKF 45) method and shooting approach are used. Graphical representations are used to study and address the effect of important factors on flow fields, heat, and mass transfer rates. The outcome reveals that, rising values of porous and suction parameters declines the velocity field. The rise in values of heat source/sink parameter declines the heat transfer. Moreover, rate of declination in heat transfer is faster for Newtonian heating (NH) case than common wall temperature (CWT) case. The rise in values of volume fraction and heat source/sink parameter declines the Nusselt number for both CWT and NH cases. Further, the fluid shows improved rate of heat transfer for CWT case than NH case.