Simultaneous visualization of the flow inside and around droplets generated in microchannels
- Journal Article
Rights / licenseIn Copyright - Non-Commercial Use Permitted
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. Show more
Journal / seriesMicrofluidics and Nanofluidics
Pages / Article No.
SubjectMicroparticle image velocimetry; Co-flow geometry; Droplet generation; Viscoelasticity; Fluid elasticity; Internal flow
Organisational unit08821 - Fischer, Peter (Tit.-Prof.)
03345 - Windhab, Erich Josef (emeritus) / Windhab, Erich Josef (emeritus)
NotesIt was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
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