Interface Behavior in Functionally Graded Ceramics for the Magnetic Refrigeration: Numerical Modeling

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    Abstract

    The active magnetic regenerator refrigerator is currently the most common magnetic refrigeration device for near room temperature applications, and it is driven by the magnetocaloric effect in the regenerator material. In order to make this efficient, a graded configuration of the magnetocaloric material is needed. Tape casting is a common process in producing functional ceramics, and it has recently been established for producing side-by-side (SBS) functionally graded ceramics (FGCs). The main goal of the present work is to study the multiple material flows in SBS tape casting and analyze the influence of the different material properties, i.e. the density and the viscosity, on the interface between the flows, since this is highly important for the efficiency of the device. The Newtonian flow behavior with relatively high viscosity is assumed for each fluid and used in the simulation with a commercial CFD code (ANSYS FLUENT). The results show that the density change does not affect the interface between the adjacent fluids. The viscosity of the fluids plays the most important role in the behavior of the interface. Moreover, increasing the viscosity
    difference of the adjacent flows, Δμ , leads to increasing the diffusive region between the two fluids.
    Original languageEnglish
    Book seriesApplied Mechanics and Materials
    Volume325-326
    Pages (from-to)1362-1367
    ISSN1660-9336
    DOIs
    Publication statusPublished - 2013
    Event2nd International Conference on Intelligent Materials, Applied Mechanics and Design Science (IMAMD 2013) - Guangzhou, China
    Duration: 13 Apr 201314 Apr 2013
    Conference number: 2

    Conference

    Conference2nd International Conference on Intelligent Materials, Applied Mechanics and Design Science (IMAMD 2013)
    Number2
    Country/TerritoryChina
    CityGuangzhou
    Period13/04/201314/04/2013

    Keywords

    • Magnetic refrigeration
    • Functionally graded ceramics (FGCs)
    • Tape casting
    • Fluid flow

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