Buoyancy driven magnetohydrodynamic hybrid nanofluid flow within a circular enclosure fitted with fins

Abstract

Various geometrical types of fins are used in numerous engineering and technological applications like semiconductor devices, gas turbines, electric transformers, automobile radiators, heat exchangers, hydrogen fuel cells, air-cooled engines, etc. Compared to conventional coolants, nanofluids explore superior thermal conductivities and thereby promote outstanding heat transport capabilities. Such unique noteworthy applications motivate the study of the hydrothermal fallouts of natural convective laminar magnetically influenced Ag-MgO-water hybrid nanofluid flows within a circular enclosure fitted with I-shaped rectangular fins of different lengths. The outer circular boundary is made cold, whereas the inner fitted fins remain heated. Requisite similarity variables have been incorporated to alter the dimensional equations into non-dimensional. After then, the Galerkin technique-based finite element strategy is chosen to run the entire numerical simulation. Various velocities, isotherms, streamlines, Nusselt number plots are generated to disclose the impact of different fins' lengths on the thermal control and flow behavior. Requisite plots are portrayed for the parametric variations of Rayleigh number (103 ≤ Ra ≤ 105), Hartmann number (2 ≤ Ha ≤ 6), and nanoparticle concentrations (0.00 ≤ ϕ2 ≤ 0.015). The higher intensity in isotherms, velocity, and streamlines is noted for AR = 1.1. Numerically higher heat transmission is realized for Rayleigh numbers, nanoparticle concentrations, and for AR = 1.1.Mathematics subject classification: 76W05