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  Dynamical theory of the inverted cheerios effect

Pandey, A., Karpitschka, S., Lubbers, L. A., Weijs, J. H., Botto, L., Das, S., et al. (2017). Dynamical theory of the inverted cheerios effect. Soft Matter, 13(35), 6000-6010. doi:10.1039/C7SM00690J.

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Pandey, A., Author
Karpitschka, Stefan1, Author              
Lubbers, L. A., Author
Weijs, J. H., Author
Botto, L., Author
Das, S, Author
Andreotti, B, Author
Snoeijer, J. H., Author
Affiliations:
1Group Fluidics in heterogeneous environments, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2466703              

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 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.

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Language(s): eng - English
 Dates: 2017-07-262017
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/C7SM00690J
BibTex Citekey: Karpitschka:SoftMatt17-2
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Title: Soft Matter
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 13 (35) Sequence Number: - Start / End Page: 6000 - 6010 Identifier: ISSN: 1744-683X
CoNE: https://pure.mpg.de/cone/journals/resource/1744-683X