Communications: Wall free capillarity and pendant drop removal

Siang Jie Hong, Feng Ming Chang, Seong Heng Chan, Yu Jane Sheng, Heng Kwong Tsao

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

When a sessile drop encounters a pendant drop through a hole, it is generally anticipated that they will coalesce and flow downward due to gravity. However, like "wall-free" capillarity, we show that the pendant drop may be sucked up by a sliding drop instantaneously if the radius of the curvature of the former is smaller than that of the later. This phenomenon can be explained by Laplace-Young equation and convective Ostwald ripening. Our results indicate that superhydrophilic perforated surface can be used as an effective way for the removal of small droplets adhering to the inner walls of microchannel systems.

Original languageEnglish
Article number161104
JournalJournal of Chemical Physics
Volume132
Issue number16
DOIs
StatePublished - 28 Apr 2010

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