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  • Heat transfer in plug flow in cylindrical microcapillaries with constant surface heat flux

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    86790_1.pdf (591.9Kb)
    Author(s)
    Che, Zhizhao
    Wong, Teck Neng
    Nam-Trung, Nguyen
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2013
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    Abstract
    Due to the presence of interfaces, heat transfer can be enhanced by the vortices in liquid plugs in microchannel heat exchangers. The heat transfer in liquid plugs moving in microcapillaries with constant-surface-heat flux boundary condition is investigated. The e ects of the Peclet number and the plug length are studied. Higher Peclet numbers and shorter plug length result in higher Nusselt numbers and lower maximum uid temperature. However, higher Peclet numbers require higher ow speed, while shorter plug lengths result in higher flow resistance coefficients. The pressure drop needs to be considered in the optimization ...
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    Due to the presence of interfaces, heat transfer can be enhanced by the vortices in liquid plugs in microchannel heat exchangers. The heat transfer in liquid plugs moving in microcapillaries with constant-surface-heat flux boundary condition is investigated. The e ects of the Peclet number and the plug length are studied. Higher Peclet numbers and shorter plug length result in higher Nusselt numbers and lower maximum uid temperature. However, higher Peclet numbers require higher ow speed, while shorter plug lengths result in higher flow resistance coefficients. The pressure drop needs to be considered in the optimization of microchannel heat exchangers.
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    Journal Title
    International Journal of Thermal Sciences
    Volume
    64
    DOI
    https://doi.org/10.1016/j.ijthermalsci.2012.09.006
    Copyright Statement
    © 2013 Elsevier Inc. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Applied mathematics
    Mechanical engineering
    Microelectromechanical systems (MEMS)
    Other engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/53368
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    • Journal articles

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