Buoyancy-driven heat transfer analysis in a square cavity with a mounted variable length partition in the presence of magnetic field
Keywords:
free convection, nanofluid, cavity, baffle, MHDAbstract
In this study, steady, laminar, natural-convection flow in the presence of a magnetic field in a square enclosure with vertical partition, heated from left and cooled from right is considered. The horizontal walls are well insulated. The cavity is filled with Al2O3–water nanofluid. To consider the influence of magnetic force, a horizontal magnetic field is externally imposed on the left wall. The basic nonlinear differential equations describing the flow driven by natural convection consist of continuity, momentum and energy which are solved numerically utilising finite volume code based on PATANKAR’s SIMPLER method. It is found that for a given condition, the height of vertical partition has strong effect upon flow field and the rate of heat transfer. Also it is shown that Nusselt number of hot wall varies remarkably with volume fraction of nanoparticles in base fluid and changes differently at low, medium and high Rayleigh number.
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