Cu-Al2O3/water hybrid nanofluid flow over a permeable moving surface in presence of hydromagnetic and suction effects

In this new era of technology in fluid field, hybrid nanofluid has become a fruitful interest topic among researchers due to it thermal properties and potential which gives better result compared to nanofluid in enhancing the heat transfer rate. The intention here is to present the significant effects of suction and magnetic field over a moving plate containing hybrid nanofluid with base fluid is water, Alumina Oxide (Al2O3) and Copper (Cu) as the nanoparticles. A mathematical modelling consists of partial differential equation for the fluid flow are constructed and transformed to a set of ordinary differential equations hence solved numerically using bvp4c in MATLAB. Effects of magnetohydrodynamics (MHD), M, suction, S and relevant thermophysical properties on velocity, temperature, skin friction, C-f and local Nusselt, Nu(x) number are thoroughly examined and presented graphically. It is noted that duality exists in certain range when lambda(c) < - 1 and unique solution at lambda > - 1. The range on duality of solution are widen as the values of M and S increase. Due to that, a stability analysis is implied to determine which duality of solution is stable and realizable. As M and phi(2) increase, the skin friction increases. For rate of heat transfer, as M increase, the heat transfer rate increase while for arising of phi(2), the heat transfer decrease. Furthermore, it is noted that the hybrid nanofluid possess better result compared to nanofluid. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Faculty of Engineering, Alexandria University.