HEXAGONS, KINKS, AND DISORDER IN OSCILLATED GRANULAR LAYERS
作者： Francisco Melo , Paul B. Umbanhowar , Harry L. Swinney
DOI: 10.1103/PHYSREVLETT.75.3838
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摘要: Experiments on vertically oscillated granular layers in an evacuated container reveal a sequence of well-defined pattern bifurcations as the acceleration is increased. Period doublings layer center mass motion and standing wave instability interact to produce hexagons more complicated patterns composed distinct spatial domains different relative phase separated by kinks (phase discontinuities). A simple model displays quantitative agreement with observed transition sequence. {copyright} {ital 1995} The} American} Physical} Society}.
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