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Issue 13, 2021
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Wetting equilibrium in a rectangular channel

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Abstract

When a capillary channel with corners is wetted by a fluid, there are regions where the fluid fills the whole cross-section and regions where only the corners are filled by the fluid. The fluid fraction of the partially-filled region, s*, is an important quantity related to the capillary pressure. We calculate the value of s* for channels with a cross-section slightly deviated from a rectangle: the height is larger in the center than those on the two short sides. We find that a small change in the cross-section geometry leads to a huge change of s*. This result is consistent with experimental observations.

Graphical abstract: Wetting equilibrium in a rectangular channel

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Article information


Submitted
26 Sep 2020
Accepted
03 Dec 2020
First published
07 Dec 2020

Soft Matter, 2021,17, 3594-3602
Article type
Paper

Wetting equilibrium in a rectangular channel

T. Yu, Q. Sun, C. Zhao, J. Zhou and M. Doi, Soft Matter, 2021, 17, 3594 DOI: 10.1039/D0SM01727B

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