Nonmonotonic reversible branch in four model granular beds subjected to vertical vibration
arXiv:0803.1100 · doi:10.1103/PhysRevE.78.051305
Abstract
We present results from four independent models of a granular assembly subjected to tapping. We find that the steady-state packing fraction as a function of the tapping intensity is nonmonotonic. In particular, for high tapping intensities, we observe an increase of the packing fraction with tapping strength. This finding challenges the current understanding of compaction of granular media since the steady-state packing fraction is believed to decrease monotonically with increasing tapping intensity. We propose an explanation of our results based on the properties of the arches formed by the particles.
8 pages, 7 figures
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- Probing ergodicity in granular matter
- Arches and contact forces in a granular pile
- Steady state of tapped granular polygons
- Effect of packing fraction on the jamming of granular flow through small apertures
- Universal Features of Annealing and Aging in Compaction of Granular Piles
- Master curves for the stress tensor invariants in stationary states of static granular beds. Implications for the thermodynamic phase space
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- Exact predictions from Edwards ensemble vs. realistic simulations of tapped narrow two-dimensional granular columns
- Ergodic-nonergodic transition in tapped granular systems: The role of persistent contacts
- The effects of grain shape and frustration in a granular column near jamming
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- Extremal fluctuations driving the relaxation in glassy energy landscapes
- Wang-Landau algorithm for entropic sampling of arch-based microstates in the volume ensemble of static granular packings
- Density Fluctuations in Granular Piles Traversing the Glass Transition: A Grain-Scale Characterization of the Transition via the Internal Energy