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  • Thermocoalescence of microdroplets in a microfluidic chamber

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    Author(s)
    Trung-Dung, Luong
    Nam-Trung, Nguyen
    Sposito, Alex
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2012
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    Abstract
    Droplet coalescence plays an important role in droplet-based microfluidics. This letter reports the phenomenon of thermocoalescence of two droplets in a chamber with a microheater. An integrated resistive sensor allows the measurement of heating temperature. The merging process was investigated at different flow rates. Experimental results showed that the droplet slows down at increasing temperature and eventually merges with the subsequent droplet. Coalescence occurs at a critical heating temperature. The letter discusses the relationship between droplet velocity, critical merging temperature, and flow rates.Droplet coalescence plays an important role in droplet-based microfluidics. This letter reports the phenomenon of thermocoalescence of two droplets in a chamber with a microheater. An integrated resistive sensor allows the measurement of heating temperature. The merging process was investigated at different flow rates. Experimental results showed that the droplet slows down at increasing temperature and eventually merges with the subsequent droplet. Coalescence occurs at a critical heating temperature. The letter discusses the relationship between droplet velocity, critical merging temperature, and flow rates.
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    Journal Title
    Applied Physics Letters
    Volume
    100
    Issue
    25
    DOI
    https://doi.org/10.1063/1.4730606
    Copyright Statement
    © 2012 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 [citation of published article] and may be found at [URL/link for published article abstract].
    Subject
    Physical sciences
    Engineering
    Microelectromechanical systems (MEMS)
    Publication URI
    http://hdl.handle.net/10072/50065
    Collection
    • Journal articles

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