Hexagons, kinks, and disorder in oscillated granular layers

Francisco Melo*, Paul B. Umbanhowar, Harry L. Swinney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

386 Scopus citations


Experiments on vertically oscillated granular layers in an evacuated container reveal a sequence of well-defined pattern bifurcations as the container acceleration is increased. Period doublings of the layer center of mass motion and a standing wave instability interact to produce hexagons and more complicated patterns composed of distinct spatial domains of different relative phase separated by kinks (phase discontinuities). A simple model displays quantitative agreement with the observed transition sequence.

Original languageEnglish (US)
Pages (from-to)3838-3841
Number of pages4
JournalPhysical review letters
Issue number21
StatePublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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