Crossover transition in flowing granular chains

Xialing Ulrich, Eliot Fried, Amy Q. Shen

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report on the dynamical and statistical behavior of flowing collections of granular chains confined two-dimensionally (2D) within a rotating tumbler. Experiments are conducted with systems of chains of fixed length, but various lengths are considered. The dynamics are punctuated by cascades of chains along a free-surface cascades, which drive the development of mixed porous/laminar packing arrangements in bulk. We investigate the conformation of the system, as characterized by the porosity of the flow region occupied by the chains and the mean-square end-to-end distance of the chains during flow. Both of these measures show crossover transitions from a 2D self-avoiding walk to a 2D random walk when the chain length becomes long enough to allow self-contact.

Original languageEnglish (US)
Article number030301
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume80
Issue number3
DOIs
StatePublished - Sep 14 2009

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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