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Issue 13, 2010
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Equilibration of granular subsystems

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Abstract

We experimentally investigate the steady states of two granular assemblies differing in their material properties and allowed to exchange volume with each other under external agitation in the vicinity of their jamming transition. We extract the statistics of various static and dynamic quantities, and uncover a materials-independent relationship between the average packing fraction and its fluctuations. This relationship defines an intensive parameter which decouples from the volume statistics, and remarkably takes the same value in both subsystems. We also observe that an effective diffusion coefficient also takes the same value in each subsystem, even as the structural relaxation time increases over several orders of magnitude. These observations provide strong constraints on the eventual establishment of a granular equation of state.

Graphical abstract: Equilibration of granular subsystems

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Publication details

The article was received on 21 Dec 2009, accepted on 25 Feb 2010 and first published on 14 Apr 2010


Article type: Paper
DOI: 10.1039/B926754A
Citation: Soft Matter, 2010,6, 3074-3081
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    Equilibration of granular subsystems

    F. Lechenault and K. E. Daniels, Soft Matter, 2010, 6, 3074
    DOI: 10.1039/B926754A

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