Magnetofluidics for manipulation of convective heat transfer
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Nam-Trung, Nguyen
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Abstract
We report heat transfer manipulation and control in a magnetofluidic device. The device consists of a circular chamber with a heat source on top and is positioned next to a permanent magnet that creates a non-uniform magnetic field. Convective heat transfer was evaluated and compared for three cases: DI-water, ferrofluid, and ferrofluid under the magnetic field. Experimental results indicate enhancement of convective heat transfer with the use of diluted ferrofluid as the working fluid. However, we observed a reduction in outlet temperature and Nusselt number in the presence of a non-uniform magnetic field. In addition, we report a full simulation of transport phenomena in the system explaining the physics of this phenomenon. The simulation results agree with the experimental data, and show the same trends.
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International Communications in Heat and Mass Transfer
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81
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© 2017 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
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Mechanical engineering
Microelectromechanical systems (MEMS)