Nanofluid implementation for heat transfer augmentation of magneto hydrodynamic flows in a lid-driven cavity using experimental-based correlations

Abstract

In this research, effects of adding nano-sized particles to base fluid on heat transfer and fluid flow in a lid-driven cavity in presence of magnetic field has been numerically analyzed. In the present work, nano-sized additives are alumina nanoparticles which play controlling role in the adjustment of heat transfer performance and fluid motion behavior for an application which is under a variable strength magnetic field. Since a fairly low value of volume fraction is assumed in this research, nanoparticles together with the base fluid behave like a new fluid. Top moving lid and bottom walls of cavity are insulated, whereas left and right walls are defined as hot and cold sources, respectively. Relevant parameters in the present article are Reynolds number, considered to be 100, Prandtl number, assumed to be 6.2, Rayleigh number (10 ^{2} < Gr < 10 ^{5} ), volume fraction number (0 < φ 0.05) and Hartmann number (0 < Ha < 50). Results are presented in form of streamlines, isotherms, local and average Nusselt numbers.