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  • Analysis of chaotic mixing in plugs moving in meandering microchannels

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    85213_1.pdf (2.332Mb)
    Author(s)
    Che, Zhizhao
    Nam-Trung, Nguyen
    Wong, Teck Neng
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2011
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    Abstract
    Droplets moving in meandering microchannels can serve as a passive and robust strategy to produce chaotic mixing of species in droplet-based microfluidics. In this paper, a simplified theoretical model is proposed for plug-shaped droplets moving in meandering microchannels at Stokes flow. With this model to provide the velocity field, particle tracking, which requires a large computation time, is performed directly and easily without interpolation. With this convenience, a broad survey of the parameter space is carried out to investigate chaotic mixing in plugs, including the channel curvature, the Peclet number, the viscosity ...
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    Droplets moving in meandering microchannels can serve as a passive and robust strategy to produce chaotic mixing of species in droplet-based microfluidics. In this paper, a simplified theoretical model is proposed for plug-shaped droplets moving in meandering microchannels at Stokes flow. With this model to provide the velocity field, particle tracking, which requires a large computation time, is performed directly and easily without interpolation. With this convenience, a broad survey of the parameter space is carried out to investigate chaotic mixing in plugs, including the channel curvature, the Peclet number, the viscosity ratio, and the plug length. The results show that in order to achieve rapid mixing in plugs in meandering microchannels, a large curvature, a small Peclet number, a moderate viscosity ratio, and a moderate plug length are preferred.
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    Journal Title
    Physical Review E
    Volume
    84
    Issue
    6
    DOI
    https://doi.org/10.1103/PhysRevE.84.066309
    Copyright Statement
    © 2011 American Physical Society. 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
    Mathematical sciences
    Physical sciences
    Engineering
    Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
    Publication URI
    http://hdl.handle.net/10072/53049
    Collection
    • Journal articles

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