Heat transfer analysis of a hybrid nanofluid flow on a rotating disk considering thermal radiation effects

This study investigates heat transfer in a hybrid nanofluid that flows due to a rotating disk. The nanofluid contains copper and dioxide nanoparticles in water and is affected by a constant magnetic field. The study accounts for heat generation/absorption and thermal radiation and solves the governing equations using similarity transformations and the Shooting Method. The research reveals that the higher nanoparticle concentration in a fluid result in increased radial and azimuthal velocities due to improved convective heat transfer. This leads to higher fluid velocity and lower local skin friction coefficient. Heat generation/absorption and thermal radiation have a strong influence on the heat transfer process. Higher nanoparticle concentration, variable thermal conductivity parameter, and radiation parameter cause an increase in the temperature of the hybrid nanofluid. The local Nusselt number increases with an increase in the variable thermal conductivity parameter but decreases with nanoparticle concentration while increases with the thermal radiation parameter. Results from a special case analysis, which excluded certain parameters, closely agree with previous studies, confirming the validity of the solution. These findings can be useful in understanding heat transfer in similar scenarios, especially in energy engineering and thermal management.

Automated summary

This study examines heat transfer in a rotating disk-driven hybrid nanofluid. The nanofluid is composed of copper and dioxide nanoparticles in water and is subjected to a constant magnetic field. The researchers consider heat generation/absorption and thermal radiation and employ similarity transformations and the Shooting Method to solve the governing equations. The research demonstrates that higher nanoparticle concentration in the fluid enhances convective heat transfer, resulting in increased radial and azimuthal velocities, higher fluid velocity, and a lower local skin friction coefficient. Heat generation/absorption and thermal radiation significantly influence the heat transfer process. Additionally, the temperature of the hybrid nanofluid increases with higher nanoparticle concentration, variable thermal conductivity parameter, and radiation parameter. The local Nusselt number increases with the variable thermal conductivity parameter, but decreases with nanoparticle concentration while increases with the thermal radiation parameter. The results of a special case analysis align closely with previous studies, confirming the validity of the solution. These findings are particularly relevant to energy engineering and thermal management, providing insight into heat transfer in similar scenarios.