Structure and dynamics of a bidimensional pattern of liquid columns |
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| Authors: | Email author" target="_blank">P?BrunetEmail author G?Gauthier L?Limat D?Vallet |
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| Institution: | (1) Laboratoire de Physique et Mécanique des Milieux Hétérogènes UMR7636 CNRS, Ecole Supérieure de Physique et Chimie Industrielles, 10, rue Vauquelin, 75231 Paris Cedex 05, France;(2) Fédération de Recherche Matière et Systèmes Complexes, FR 2438 CNRS, France;(3) Present address: Department of Mechanics, Kungliga Tekniska Hogskolan, 10044 Stockholm, Sweden |
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| Abstract: | We report an experimental study of the structure and dynamics of a bidimensional array of liquid columns. This pattern is formed below a flat porous plate continuously supplied with liquid. It exhibits a marked hexagonal tendency. Its typical wavelength is close to that of the most dangerous mode of the Rayleigh–Taylor instability of a thin viscous layer hanging below a plate, defined by the competition between gravity and surface tension. Collective dynamical behaviors are also evidenced, involving oscillations of the column positions, columns migrations, coalescences and nucleations. Quantitative comparisons are presented with the equivalent one-dimensional pattern formed below the perimeter of an overflowing dish ( circular fountain experiment ).
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