Mechanical stability of ordered droplet packings in microfluidic channels

Jean-Baptiste Fleury, Ohle Claussen, Stephan Herminghaus, Martin Brinkmann, Ralf Seemann

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Abstract

The mechanical response and stability of one and two-row packing of monodisperse emulsion droplets are studied in quasi 2d microchannels under longitudinal compression. Depending on the choice of parameter, a considered droplet arrangement is either transformed continuously into another packing under longitudinal compression or becomes mechanically unstable and segregates into domains of higher and lower packing fraction. Our experimental results are compared to analytical calculations for 2d-droplet arrangements with good quantitative agreement. This study also predicts important consequences for the stability of droplet arrangements in flowing systems.
Original languageEnglish
Article number244104
JournalApplied Physics Letters
Volume99
Issue number24
DOIs
Publication statusPublished - 12 Dec 2011
Externally publishedYes

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