Phys. Rev. E 57, R1239–R1242 (1998)Oscillons, spiral waves, and stripes in a model of vibrated sand
A semicontinuum model of a thin layer of vibrated sand is proposed that qualitatively reproduces experimental observations of localized subharmonic excitations (“oscillons”) in addition to globally striped patterns. Numerical simulations recover a phase diagram similar to experimental observations and physical mechanisms for the transitions across phase boundaries are proposed. A scaling law is given for the size of the stripes and oscillons. Simulations in a different region of phase space reveal spiral waves. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.57.R1239
DOI:
10.1103/PhysRevE.57.R1239
PACS:
83.10.Pp, 83.70.Fn, 47.54.+r, 46.10.+z
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