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  • Thermally controlled droplet formation in flow focusing geometry: Formation regimes and effect of nanoparticle suspension

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    Author(s)
    Tan, Say-Hwa
    Murshed, SM Sohel
    Nguyen, Nam-Trung
    Wong, Teck Neng
    Yobas, Levent
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Tan, Say Hwa H.
    Year published
    2008
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    Abstract
    This paper reports experimental investigations on the droplet formation of deionized water and a nanofluid in a heat-induced microfluidic flow focusing device. Besides the effect of temperature, the effects of nanoparticle suspension (nanofluid) and the flow rate of aqueous fluid on the droplet formation and size manipulation were studied. At constant flow rates of the two liquids, three different droplet breakup regimes were observed and their transition capillary numbers as well as temperatures were identified. The heat generated by an integrated microheater changes the droplet formation process. Increasing the temperature ...
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    This paper reports experimental investigations on the droplet formation of deionized water and a nanofluid in a heat-induced microfluidic flow focusing device. Besides the effect of temperature, the effects of nanoparticle suspension (nanofluid) and the flow rate of aqueous fluid on the droplet formation and size manipulation were studied. At constant flow rates of the two liquids, three different droplet breakup regimes were observed and their transition capillary numbers as well as temperatures were identified. The heat generated by an integrated microheater changes the droplet formation process. Increasing the temperature enlarges the size of the droplets significantly. These results also demonstrate that the titanium oxide (15?nm)/deionized water-based nanofluid exhibits similar characteristics in droplet formation at different temperatures and any small change in the flow rate of this nanofluid has little impact on the size of the droplets formed in a flow focusing geometry.
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    Journal Title
    Journal of Physics D: Applied Physics
    Volume
    41
    Issue
    16
    DOI
    https://doi.org/10.1088/0022-3727/41/16/165501
    Copyright Statement
    © 2008 Institute of Physics Publishing. 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
    Physical sciences
    Other physical sciences not elsewhere classified
    Engineering
    Publication URI
    http://hdl.handle.net/10072/62157
    Collection
    • Journal articles

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