Hierarchically related processes and macroscopic emergence of fluctuations in weakly perturbed granular media

Gianfranco D'Anna and Patrick Mayor

Physica A: Statistical Mechanics and its Applications, 2003, vol. 325, issue 1, 267-273

Abstract: We report an experiment where a torsion oscillator is forced to penetrate a granular system over a small distance as, and the angular deflection is continuously detected. From angular deflections time series we deduce the granular noise and obtain insights on the grain-level mechanisms. In particular, we identify a control parameter, as, on which the granular noise depends exponentially. At very low as, the granular noise follows a Vogel–Fulcher–Tammann glass-like law. We explain this dependence with the idea that the macroscopic granular dynamics, seen by the oscillator, is governed by the emergence of extreme mesoscopic fluctuations.

Keywords: Granular matter; Grain-level mechanisms; Glassy behavior; Extreme order statistics (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:325:y:2003:i:1:p:267-273

DOI: 10.1016/S0378-4371(03)00205-X

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