Dynamical theory of the inverted cheerios effect

Anupam Pandey, Stefan Karpitschka, Luuk A. Lubbers, Joost H. Weijs, Lorenzo Botto, Siddhartha Das, Bruno Andreotti, Jacco H. Snoeijer

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9 Citations (Scopus)

Abstract

Recent experiments have shown that liquid drops on highly deformable substrates exhibit mutual interactions. This is similar to the Cheerios effect, the capillary interaction of solid particles at a liquid interface, but now the roles of solid and liquid are reversed. Here we present a dynamical theory for this inverted Cheerios effect, taking into account elasticity, capillarity and the viscoelastic rheology of the substrate. We compute the velocity at which droplets attract, or repel, as a function of their separation. The theory is compared to a simplified model in which the viscoelastic dissipation is treated as a localized force at the contact line. It is found that the two models differ only at small separation between the droplets, and both of them accurately describe experimental observations.

Original languageEnglish
Pages (from-to)6000-6010
JournalSoft matter
Volume13
Issue number35
DOIs
Publication statusPublished - 21 Sep 2017

Cite this

Pandey, A., Karpitschka, S., Lubbers, L. A., Weijs, J. H., Botto, L., Das, S., ... Snoeijer, J. H. (2017). Dynamical theory of the inverted cheerios effect. Soft matter, 13(35), 6000-6010. https://doi.org/10.1039/c7sm00690j