2020
DOI: 10.48550/arxiv.2005.01974
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Capillary Levelling of Immiscible Bilayer Films

Vincent Bertin,
Carmen Lee,
Thomas Salez
et al.

Abstract: Flow in thin films is highly dependent on the boundary conditions. Here, we study the capillary levelling of thin bilayer films composed of two immiscible liquids. Specifically, a stepped polymer layer is placed atop another, flat polymer layer. The Laplace pressure gradient resulting from the curvature of the step induces flow in both layers, which dissipates the excess capillary energy stored in the stepped interface. The effect of different viscosity ratios between the bottom and top layers is investigated.… Show more

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