Volume Fluctuations and Geometrical Constraints in Granular Packs

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dc.contributor.authorAste, Tomaso
dc.date.accessioned2015-12-13T23:03:37Z
dc.date.available2015-12-13T23:03:37Z
dc.date.issued2006
dc.date.updated2015-12-12T07:50:23Z
dc.description.abstractI study the structural organization and correlations in very large packings of equally sized spheres, reconstructed in three dimensions with x-ray computed tomography. I show that the geometrical structure can be conveniently studied as a packing of irregular tetrahedra with volume distribution that must decay exponentially with parameters controlled by the conditions of mechanical stability, nonoverlapping, and space filling. I argue that the system’s structure can be described as constituted of two phases: (1) an “unconstrainedâ€phase which freely shares the volume and (2) a “constrained†phase which assumes configurations accordingly with the geometrical constraints. It results that the granular system exploits heterogeneity maximizing freedom and entropy while constraining mechanical stability.
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/1885/85018
dc.publisherAmerican Physical Society
dc.sourcePhysical Review Letters
dc.subjectKeywords: Computerized tomography; Entropy; Packing; Stability; X ray analysis; Granular system; Mechanical stability; Parameters control; Granular materials
dc.titleVolume Fluctuations and Geometrical Constraints in Granular Packs
dc.typeJournal article
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage018002-1-4
local.contributor.affiliationAste, Tomaso, College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailrepository.admin@anu.edu.au
local.contributor.authoruidAste, Tomaso, u4044222
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor030603 - Colloid and Surface Chemistry
local.identifier.ariespublicationMigratedxPub13218
local.identifier.citationvolume96
local.identifier.doi10.1103/PhysRevLett.96.018002
local.identifier.scopusID2-s2.0-32644484890
local.identifier.uidSubmittedByMigrated
local.type.statusPublished Version

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