Thermal Performance of MHD Nanofluid Flow Over a Stretching Sheet Due to Viscous Dissipation, Joule Heating and Thermal Radiation

Abstract

The aim of this study is to analyze the influence of viscous-Joule heating, thermal radiation and heat generation (or absorption) on MHD nanofluid flow through a stretching sheet embedded in porous medium due to suction/blowing. The principal partial differential equations related to conservation terms of hydro-thermal flow are transformed into non-dimensional ODEs applying appropriate transformations. Then obtained non-linear equations are explained numerically with the help of fourth-fifth order RK-Fehlberg technique via shooting process. Two shape dependent models of nanoparticles based on their different expressions of dynamic viscosity and thermal conductivity are also considered. The velocity and temperature distribution profiles are constructed for sundry physical factors, such as magnetic parameter, heat generation/absorption parameter, thermal radiation parameter, dissipation parameter, suction/blowing parameter and porosity parameter. Local Nusselt number is also tabularized and examined for both nanofluid models. Some of the results of the investigation are effects of porosity parameter and magnetic parameter is to decrease the velocity profiles, which is responsible for increment in temperature profiles. Moreover, temperature fields show similar behavior for radiation and viscous dissipation parameter, but the reverse trend is observed in the case of suction/blowing parameter. The obtained results are validated with existing ones for limiting sense, and provided excellent agreement.