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Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Dec;90(6):062201. Epub 2014 Dec 1.

Angularly anisotropic correlation in granular packings.

Author information

1
Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
2
Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.

Abstract

We present an x-ray microtomography study of the three-dimensional structural correlations in monodisperse granular packings. By measuring an orientation-dependent pair correlation function, we find that the local structure shows an angularly anisotropic orientation correlation. The correlation is strongest along the major axis of the local Minkowski tensor of the Voronoi cell. It turns out that this anisotropic correlation is consistent with the existence of some locally favored structures. The study suggests the importance of high-order structural correlations in random granular packings.

PMID:
25615079
DOI:
10.1103/PhysRevE.90.062201

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