Creep motion of a granular pile induced by thermal cycling

Abstract : We report a time-resolved study of the dynamics associated with the slow compaction of a granular column submitted to thermal cycles. The column height displays a complex behavior: for a large amplitude of the temperature cycles, the granular column settles continuously, experiencing a small settling at each cycle; By contrast, for small-enough amplitude, the column exhibits a discontinuous and intermittent activity: successive collapses are separated by quiescent periods whose duration is exponentially distributed. We then discuss potential mechanisms which would account for both the compaction and the transition at finite amplitude.
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Contributor : Thibaut Divoux <>
Submitted on : Friday, December 12, 2008 - 1:25:23 PM
Last modification on : Thursday, April 19, 2018 - 2:54:03 PM
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Thibaut Divoux, Hervé Gayvallet, Jean-Christophe Géminard. Creep motion of a granular pile induced by thermal cycling. Physical Review Letters, American Physical Society, 2008, 101 (148303), pp.4. ⟨10.1103/PhysRevLett.101.148303⟩. ⟨ensl-00346818⟩

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