Heat Transfer Analysis of Fe3O4 Water based Magnetic Nanofluid under the Influence of Magnetic Field

Abstract

v newlineAbstract newlineEnhancing the heat transfer rate of heat exchange fluids is crucial for improving the efficiency newlineof thermal systems. Nanofluids, with their enhanced heat exchanging capabilities, have newlineemerged as promising alternatives for various industrial applications, including electronic newlinecooling, solar thermal systems, heat exchangers. Among these, magnetic nanofluids, composed newlineof magnetic nanoparticles suspended in a base fluid, stand out due to their tunable thermal newlineproperties under the influence of external magnetic fields. However, significant research gaps newlineexist in modelling and controlling their heat transfer characteristic. This study employs a newlinecompact, batch-type heat exchanger of concentric cylinder configuration, classified under newlineconstruction-based classification, to experimentally investigate the influence of magnetic field newlineintensity (0.9 2.4 mT), field frequency (0 5000 Hz), and nanoparticle concentration (0.1 1.0 newlinewt.%) on the heat transfer coefficient of Feand#8323;Oand#8324;-based ferrofluids through a custom-designed newlineexperimental setup. newlineKey findings reveal that increasing the magnetic field intensity significantly enhances newlinethe heat transfer coefficient, whereas higher field frequencies tend to diminish it with maximum newlineenhancement at 50 Hz. Based on these results, a fuzzy logic controller is proposed and newlineimplemented in a MATLAB®/Simulink environment. This controller regulates the heat transfer newlinecoefficient by dynamically adjusting magnetic parameters, thereby advancing heat transfer newlinemanagement capabilities. newlineWhile this work successfully links controllable magnetic parameters to thermal newlinebehavior, enabling intelligent thermal management strategies for future ferrofluid-based newlinecooling systems, it is important to note the current limitations. These include the use of newlinestationary fluid conditions without explicit convection modelling and the absence of real-time newlineexperimental validation for the proposed control scheme. newlineKeywords: Magnetic nanofluid, Ferrofluid, Magnetic Field, Heat Transfer Control