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arXiv · 1410.6783

Non-Equilibrium Gibbs' Criterion for Completely Wetting Volatile Liquids

Yannis Tsoumpas·Sam Dehaeck·Mariano Galvagno·Alexey Rednikov·Heidi Ottevaere·Uwe Thiele·Pierre Colinet
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Abstract

During the spreading of a liquid over a solid substrate, the contact line can stay pinned at sharp edges until the contact angle exceeds a critical value. At (or sufficiently near) equilibrium, this is known as Gibbs' criterion. Here, we show both experimentally and theoretically that for completely wetting volatile liquids there also exists a dynamically-produced critical angle for depinning, which increases with the evaporation rate. This suggests that one may introduce a simple modification of the Gibbs' criterion for (de)pinning, that accounts for the non-equilibrium effect of evaporation.

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Yannis Tsoumpas, Sam Dehaeck, Mariano Galvagno, Alexey Rednikov, Heidi Ottevaere, Uwe Thiele, Pierre Colinet. 2014-10-24. Non-Equilibrium Gibbs' Criterion for Completely Wetting Volatile Liquids. https://doi.org/10.1021/la502708f

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