Improved heat conduction in hybrid nanofluid across a slippery rotating cylinder with solar radiation and Lorentz forces

Abstract

A promising material for improving heat transfer is titanium dioxide ( Ti O 2 ), which has great chemical and physical stability. In numerous types of heat exchangers, including circular tubes, double tubes, and shell and tubes, Ti O 2 nanoparticles dispersed in ordinary fluids were widely used. The present work is to investigate the behavior of titanium dioxide Ti O 2 - copper oxide CuO / H 2 O hybrid type of nanofluid flow for enhancing thermal transfer by a horizontal rotating cylinder surface under solar radiation, viscous dissipation and Lorentz forces. Here, the combinations of Ti O 2 - C u O / H 2 O as hybrid nanofluids and Ti O 2 / H 2 O as nanofluid are implemented. The slip and convective conditions are imposed at the surface of the rotating cylinder. The computational MATLAB software’s bvp4c solver is used to numerically integrate the resulting dimensionless equations. According to the results, higher Reynolds number values upsurge the system’s inertial force, which counteracts the force accelerating the liquid and reduces velocities as well as heat transfer. The thermal profile benefits from the nonlinear radiation and decays for growing estimations of nanoparticle volume fraction. The rate of heat transfer is higher for Ti O 2 - C u O / H 2 O hybrid nanofluid as compared to Ti O 2 / H 2 O nanofluid.