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

Duxenneuner, Manuela R., Fischer, Peter, Windhab, Erich J. and Cooper-White, Justin J. (2014) Simultaneous visualization of the flow inside and around droplets generated in microchannels. Microfluidics and Nanofluidics, 16 4: 743-755. doi:10.1007/s10404-013-1259-9


Author Duxenneuner, Manuela R.
Fischer, Peter
Windhab, Erich J.
Cooper-White, Justin J.
Title Simultaneous visualization of the flow inside and around droplets generated in microchannels
Journal name Microfluidics and Nanofluidics   Check publisher's open access policy
ISSN 1613-4982
1613-4990
Publication date 2014-04-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s10404-013-1259-9
Open Access Status Not Open Access
Volume 16
Issue 4
Start page 743
End page 755
Total pages 13
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract 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.
Keyword Co-flow geometry
Droplet generation
Fluid elasticity
Internal flow
Microparticle image velocimetry
Viscoelasticity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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