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Modelling unidirectional liquid spreading on slanted microposts
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Paper
Modelling unidirectional liquid spreading on slanted microposts
2013
Overview
A lattice Boltzmann algorithm is used to simulate the slow spreading of drops on a surface patterned with slanted micro-posts. Gibb's pinning of the interface on the sides or top of the posts leads to unidirectional spreading over a wide range of contact angles and inclination angles of the posts. Regimes for spreading in no, one or two directions are identified, and shown to agree well with a two-dimensional theory proposed in Chu, Xiao and Wang (Nature Materials, 9, 413). A more detailed numerical analysis of the contact line shapes allows us to understand deviations from the two dimensional model, and to identify the shapes of the pinned interfaces.
Publisher
Cornell University Library, arXiv.org
