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Simultaneous visualization of the flow inside and around droplets generated in microchannels

Duxenneuner, Manuela ; Fischer, Peter ; Windhab, Erich ; Cooper-White, Justin

In: Microfluidics and Nanofluidics, 2014, vol. 16, no. 4, p. 743-755

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    Titel
    • Simultaneous visualization of the flow inside and around droplets generated in microchannels
    Autor
    • Duxenneuner, Manuela. Institute of Food, Nutrition and Health, ETH Zurich, 8092, Zürich, Switzerland
    • Fischer, Peter. Institute of Food, Nutrition and Health, ETH Zurich, 8092, Zürich, Switzerland
    • Windhab, Erich. Institute of Food, Nutrition and Health, ETH Zurich, 8092, Zürich, Switzerland
    • Cooper-White, Justin. Laboratory of Tissue Engineering and Microfluidics, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, 4072, Brisbane, QLD, Australia
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Microfluidics and Nanofluidics, 2014, vol. 16, no. 4, p. 743-755. Springer Berlin Heidelberg
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:325978
    Summary
    This paper reports the visualization of droplet formation in co-flowing microfluidic devices using food-grade aqueous biopolymer-surfactant solutions as the dispersed droplet phase and sunflower oil as the continuous phase. Microparticle image velocimetry and streak imaging techniques are utilized to simultaneously recover the velocity profiles both within and around the dispersed phase during droplet formation and detachment. Different breakup mechanisms are found for Newtonian-Newtonian and non-Newtonian-Newtonian model water-in-oil emulsions, emphasizing the influence of process and material parameters such as the flow rates of both phases, interfacial tension, and the elastic properties of the non-Newtonian droplet phase on the droplet formation detachment dynamics.