Self-replicating holes in a vertically vibrated dense suspension

We find self-replicating holes on the surface of a vertically vibrated potato starch suspension. Above certain acceleration, the finite-amplitude deformation of the surface grows to form a hole that penetrates the fluid layer. The circular shape of the hole is not stable, and the hole begins to repl...

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Bibliographic Details
Published in:Physical review letters 2011-08, Vol.107 (8), p.088301-088301, Article 088301
Main Authors: Ebata, H, Sano, M
Format: Article
Language:English
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Summary:We find self-replicating holes on the surface of a vertically vibrated potato starch suspension. Above certain acceleration, the finite-amplitude deformation of the surface grows to form a hole that penetrates the fluid layer. The circular shape of the hole is not stable, and the hole begins to replicate just like the self-replicating spots in chemical reaction-diffusion systems. At high acceleration, these holes exhibit spatiotemporal chaos. By assessing the statistical properties in a steady state, we show that fluctuation in the number of holes can be understood by a master equation.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.088301