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  • A procedure for the motion of particle-encapsulated droplets in microchannels

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    Author(s)
    Yap, YF
    Chai, JC
    Wong, TN
    Nguyen, NT
    Toh, KC
    Zhang, HY
    Yobas, L
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2008
    Metadata
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    Abstract
    A fixed-grid approach for modeling the motion of a particle-encapsulated droplet carried by a pressure-driven immiscible carrier fluid in a microchannel is presented. Three phases (the carrier fluid, the droplet, and the particle) and two different moving boundaries (the droplet-carrier fluid and droplet-particle interfaces) are involved. This is a moving-boundaries problem with the motion of the three phases strongly coupled. In the present article, the particle is assumed to be a fluid of high viscosity and constrained to move with rigid body motion. A combined formulation using one set of governing equations to treat the ...
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    A fixed-grid approach for modeling the motion of a particle-encapsulated droplet carried by a pressure-driven immiscible carrier fluid in a microchannel is presented. Three phases (the carrier fluid, the droplet, and the particle) and two different moving boundaries (the droplet-carrier fluid and droplet-particle interfaces) are involved. This is a moving-boundaries problem with the motion of the three phases strongly coupled. In the present article, the particle is assumed to be a fluid of high viscosity and constrained to move with rigid body motion. A combined formulation using one set of governing equations to treat the three phases is employed. The droplet-carrier fluid interface is represented and evolved using a level-set method with a mass-correction scheme. Surface tension is modeled using the continuum surface force model. An additional signed distance function is employed to define the droplet-particle interface. Its evolution is determined from the particle motion governed by the Newton-Euler equations. The governing equations are solved numerically using a finite-volume method on a fixed Cartesian grid. For demonstration purposes, the flows of particle-encapsulated droplets through a constricted microchannel and through a microchannel system are presented.
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    Journal Title
    Numerical Heat Transfer Part B: Fundamentals
    Volume
    53
    Issue
    1
    DOI
    https://doi.org/10.1080/10407790701632485
    Copyright Statement
    © 2008 Taylor & Francis. This is an electronic version of an article published in Numerical Heat Transfer, Part B: Fundamentals, Volume 53, Issue 1, 2008, pp. 59-74. Accounting and Business Research is available online at: http://www.tandfonline.com with the open URL of your article.
    Subject
    Interdisciplinary Engineering not elsewhere classified
    Applied Mathematics
    Civil Engineering
    Mechanical Engineering
    Publication URI
    http://hdl.handle.net/10072/62106
    Collection
    • Journal articles

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