Entropy and energy analysis of MHD nanofluid thermal transport in a non-uniformly heated annulus

Abstract

In this analysis, nanoliquid motion and thermal dissipation rate along with the associated entropy production of water-based nanoliquid have been numerically investigated in an annular geometry. The vertical boundaries are imposed with sinusoidal thermal profiles with different phase deviations, while the top and bottom are retained as insulators, and an inclined external magnetic force has also been considered. The numerical experiments reveal that the change in phase deviation produces severe nanoliquid movement due to the shifting of hot and cold regions along with the outer cylinder. The enhancement of phase deviation produces higher thermal transport rates with minimal entropy production. The influence of magnetic field angle strongly depends on the magnitude of and also the thermal performance could be improved with a proper choice of magnetic tilt angle. Further, the entropy production in the annulus greatly depends on the intensity of the applied magnetic field. An increase in the nanoparticle concentration induces the thermal conductivity of nanoliquid and in turn improves the thermal transport. Through the present analysis, we identified a set of parameters to increase the thermal transport with minimum entropy production.