Effect of wetting on capillary pumping in microchannels

Arman Javadi, Mehdi Habibi, Fereshte Samadi Taheri, Sébastien Moulinet, Daniel Bonn*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

We investigate capillary pumping in microchannels both experimentally and numerically. Putting two droplets of different sizes at the in/outlet of a microchannel, there will in general be a flow from the smaller droplet to the larger one due to the Laplace pressure difference. We show that an unusual flow from a larger droplet into a smaller one is possible by manipulating the wetting properties, notably the contact line pinning. In addition, we propose a way to actively control the flow by electrowetting.

Original languageEnglish
Article number1412
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 11 Mar 2013
Externally publishedYes

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