Convective heat transfer in magnetohydrodynamic TiO2–CuO/ethylene glycol hybrid nanofluid flow toward stagnation point on a radially stretching disk with thermal radiation

Abstract

AbstractA prime concern of this analysis is to investigate a steady, two‐dimensional, axisymmetric magnetohydrodynamic (MHD) stagnation point flow of TiO2–CuO/ethylene glycol (TiO2–CuO/EG) hybrid nanofluid through a radially stretched disk. Effects of thermal radiation, viscous dissipation, and Joule heating along convective boundary conditions have been taken into consideration. Suitable similarity conversions have been employed to simplify the set of flow controlling partial differential equations of the arising model. Subsequently, the finite element method has been utilized for computational results of the obtained set of ordinary differential equations with associated boundary conditions. The influence of various pertinent parameters, stretching parameter, solid volume fraction, magnetic parameter, Biot number, radiation parameter, and Brinkman number on dimensionless velocity and temperature have been displayed graphically. Subsequently, the responses of hybrid nanofluid (TiO2–CuO/EG) and regular nanofluid (CuO/EG) for these parameters have been compared pairwise, and it has been observed that nanoparticles in ethylene glycol are both controlling the temperature and improving the fluid velocity. Moreover, variations in local skin friction and local Nusselt number for certain values of embedded parameters have been illustrated in tabulated form. It is comprehended that augmented solid volume fraction, magnetic parameter, local Biot number, radiation parameter, and Brinkman number have improved the temperature profile. The velocity profile has been enhanced for the stretching parameter, while the reverse trend has occurred in the case of solid volume fraction and magnetic parameter. The outcomes of this study may be applicable in solar thermal systems.