Impact of Cattaneo–Christov Heat Flux On Al2O3–Cu/H2O–(CH2OH)2 Hybrid Nanofluid Flow Between Two Stretchable Rotating Disks

Abstract

An analysis is performed to studied the 3D MHD flow of Al2O3–Cu/Water (H2O)–Ethylene glycol (C2H6O2) (50–50% volume) hybrid nanofluid between two rotating stretching disks. Thermal equation is constructed of Cattaneo–Christov heat flux model with the thermal radiation, heat generation, and viscous dissipation. Using the proper similarity transformation, the system of coupled partial differential equations is transformed into a system of coupled ordinary differential equations and then solves numerically using bvp4c MATLAB routine. Present results are compared with the existing literature under certain constraints. A significant difference is observed in comparison between the significant of hybrid nanofluid and general nanofluid in velocities, temperature, skin friction, Nusselt number, and entropy generation. A noteworthy nature is observed in the fluid flow and heat transfer due to effective parameters. Entropy generation and Bejan number are calculated and displayed the results through graphs and tables. Reynolds number and magnetic parameter observed to boost up the skin friction at the lower and upper rotating disks, while rotational ratio and suction/injection helps to slow down the skin friction at both surfaces of disks. Nusselt number accumulated with radiation while an opposite phenomena appears with increase of Brinkman number. Entropy generation improved with magnetic field and Brinkman number. Pressure distribution boost up with increase in velocity slip constants at the upper and lower surfaces of the disks and rotational ratio. Skin friction shows up increment with increase of suction/injection parameters. Brinkman number and magnetic parameter enhanced the entropy generation while an opposite phenomena observed for the Bejan number. This simulations may help in thermal energy generation system and computer storage devices.