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American Physical Society, Physical Review Letters, 18(98), 2007

DOI: 10.1103/physrevlett.98.188301

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Caging Dynamics in a Granular Fluid

Journal article published in 2007 by P. M. Reis, R. A. Ingale, M. D. Shattuck
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report an experimental investigation of the caging motion in a uniformly heated granular fluid for a wide range of filling fractions, varphi. At low varphi the classic diffusive behavior of a fluid is observed. However, as varphi is increased, temporary cages develop and particles become increasingly trapped by their neighbors. We statistically analyze particle trajectories and observe a number of robust features typically associated with dense molecular liquids and colloids. Even though our monodisperse and quasi-2D system is known to not exhibit a glass transition, we still observe many of the precursors usually associated with glassy dynamics. We speculate that this is due to a process of structural arrest provided, in our case, by the presence of crystallization.