Stationary state volume fluctuations in a granular medium

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dc.creatorSchröter, Matthias
dc.creatorGoldman, Daniel I.
dc.creatorSwinney, Harry L.
dc.date2005-01-11
dc.date2005-03-31
dc.date.accessioned2026-07-07T03:03:10Z
dc.date.available2026-07-07T03:03:10Z
dc.descriptionA statistical description of static granular material requires ergodic sampling of the phase space spanned by the different configurations of the particles. We periodically fluidize a column of glass beads and find that the sequence of volume fractions phi of post-fluidized states is history independent and Gaussian distributed about a stationary state. The standard deviation of phi exhibits, as a function of phi, a minimum corresponding to a maximum in the number of statistically independent regions. Measurements of the fluctuations enable us to determine the compactivity X, a temperature-like state variable introduced in the statistical theory of Edwards and Oakeshott [Physica A {\bf 157}, 1080 (1989)].
dc.descriptionpublished with minor changes
dc.identifierhttps://arxiv.org/abs/cond-mat/0501264
dc.identifierhttp://arxiv.org/abs/cond-mat/0501264
dc.identifierPhys. Rev. E 71, 030301(R) (2005)
dc.identifierdoi:10.1103/PhysRevE.71.030301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25657
dc.subjectStatistical Mechanics
dc.titleStationary state volume fluctuations in a granular medium
dc.typetext

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