Creep motion of a granular pile induced by thermal cycling

Details Creep motion of a granular pile induced by thermal cycling Creep motion of a granular pile induced by thermal cycling

2008-06-09

arxiv.org/abs/0806.1458v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, accepted for publication in Physical Review Letters (05sep08)

Scientific paper

10.1103/PhysRevLett.101.148303

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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