Dynamics of a One-Dimensional Array of Liquid Columns

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Abstract
We study the instability induced by the gravity of a liquid layer hanging at the bottom of a horizontal cylinder and continuously supplied with "fresh" liquid. Depending on the flow rate, different regimes are observed: dripping, array of liquid columns, and liquid sheets. The column array exhibits collective behaviors that can be forced under well controlled conditions by driving the displacements of two boundary columns: optical mode (regular or "chaotic"), phase diffusion, and propagation of localized "dilation waves" of the pattern.