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  • Numerical study of thermocoalescence of microdroplets in a microfluidic chamber

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    88576_1.pdf (912.3Kb)
    Author(s)
    Ho, Peng Ching
    Nam-Trung, Nguyen
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2013
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    Abstract
    The present paper reports the numerical investigation of thermocoalescence of droplets in amicrochannel network consisting of a droplet formation section connecting to a temperature-induced merging chamber. The numerical model is formulated as an incompressible immiscible two-phase flow problem with oil and water as the continuous and dispersed phase, respectively. The governing equations are solved using finite volume method on a staggered mesh. The interface is captured by a narrow-band particle level-set method. The paper examines the droplet formation process and droplet size at 4 different ratios of oil and water flow ...
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    The present paper reports the numerical investigation of thermocoalescence of droplets in amicrochannel network consisting of a droplet formation section connecting to a temperature-induced merging chamber. The numerical model is formulated as an incompressible immiscible two-phase flow problem with oil and water as the continuous and dispersed phase, respectively. The governing equations are solved using finite volume method on a staggered mesh. The interface is captured by a narrow-band particle level-set method. The paper examines the droplet formation process and droplet size at 4 different ratios of oil and water flow rate. The motion of the droplets from the formation section into and through the heat-induced merging chamber is analyzed. The numerical method is able to provide a visual presentation of the droplet movement in a heated environment under the influence of thermocapillarity. The relationship between the critical merging temperature and the fluid flow rate is also analyzed and discussed.
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    Journal Title
    Physics of Fluids
    Volume
    25
    Issue
    9
    DOI
    https://doi.org/10.1063/1.4819134
    Copyright Statement
    © 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Phys. Fluids 25, 082006, 2013 and may be found at http://dx.doi.org/10.1063/1.4819134.
    Subject
    Mathematical sciences
    Physical sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/54012
    Collection
    • Journal articles

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