Physics
Spatial distribution functions of random packed granular spheres obtained by direct particle imaging
Document Type
Article
Abstract
We measure the two-point density correlations and Voronoi cell distributions of cyclically sheared granular spheres obtained with a fluorescence technique and compare them with random packing of frictionless spheres. We find that the radial distribution function g (r) is captured by the Percus-Yevick equation for initial volume fraction φ=0.59. However, small but systematic deviations are observed because of the splitting of the second peak as φ is increased toward random close packing. The distribution of the Voronoi free volumes deviates from postulated Γ distributions, and the orientational order metric Q6 shows local order but no long range order. Overall, these measures show significant similarity of random packing of granular and frictionless spheres, but some systematic differences as well. © 2010 The American Physical Society.
Publication Title
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Publication Date
6-8-2010
Volume
81
Issue
6
ISSN
1539-3755
DOI
10.1103/PhysRevE.81.060301
Repository Citation
Panaitescu, Andreea and Kudrolli, Arshad, "Spatial distribution functions of random packed granular spheres obtained by direct particle imaging" (2010). Physics. 123.
https://commons.clarku.edu/faculty_physics/123
