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Spontaneous patterning of confined granular rods



Spontaneous patterning of confined granular rods



Physical Review Letters 96(2): 028002



Vertically vibrated rod-shaped granular materials confined to quasi-2D containers self-organize into distinct patterns. We find, consistent with theory and simulation, a density dependent isotropic-nematic transition. Along the walls, rods interact sterically to form a wetting layer. For high rod densities, complex patterns emerge as a result of competition between bulk and boundary alignment. A continuum elastic energy accounting for nematic distortion and local wall anchoring reproduces the structures seen experimentally.

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Accession: 050368259

Download citation: RISBibTeXText

PMID: 16486645

DOI: 10.1103/physrevlett.96.028002


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