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Contact-line pinning of a perfectly wetting volatile liquid confined in a square region by a tiny triangular groove along its perimeter: experiments and theoretical static shapes.

par Tsoumpas, Ioannis ;Dehaeck, Sam ;Rednikov, Alexei ;Colinet, Pierre
Référence MULTIFLOW (November 8-10, 2010: Brussels, Belgium)
Publication Non publié, 2010-11-08

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Résumé :

As microscopic grooves or posts on a substrate act as energy barriers during the spreading of a perfectly wetting liquid droplet or film, we are trying to determine whether a groove can actually prevent the liquid spreading out of a certain region on the substrate. It is shown that the confinement of a perfectly wetting volatile liquid within a specific area is indeed possible, and a comparison of the experimentally measured liquid shapes with a static theoretical model is attempted. The role of evaporation, likely to generate finite apparent contact angles, is also discussed.