Issue |
Europhys. Lett.
Volume 51, Number 6, September II 2000
|
|
---|---|---|
Page(s) | 679 - 684 | |
Section | Interdisciplinary physics and related areas of science and technology | |
DOI | https://doi.org/10.1209/epl/i2000-00392-7 | |
Published online | 01 September 2002 |
Dynamics of vibrated granular monolayers
1
Theoretical Division and Center for Nonlinear Studies
Los Alamos National Laboratory - Los Alamos, NM 87545, USA
2
IBM Research Division, T. J. Watson Research Center
P.O. Box 218, Yorktown Heights, NY 10598, USA
Received:
10
November
1999
Accepted:
5
April
2000
We study statistical properties of vibrated granular monolayers using molecular dynamics simulations. We show that at high excitation strengths, the system is in a gas state, particle motion is isotropic, and the velocity distributions are Gaussian. As the vibration strength is lowered, the system's dimensionality is effectively reduced from three to two. Below a critical excitation strength, a cluster phase occurs, and the velocity distribution becomes bimodal. In this phase, the system consists of clusters of immobile particles arranged in close-packed hexagonal arrays, and gas particles whose energy equals the first excited state of an isolated particle on a vibrated plate.
PACS: 81.05.Rm – Porous materials; granular materials / 05.70.Fh – Phase transitions: general studies / 02.70.Ns – Molecular dynamics and particle methods
© EDP Sciences, 2000
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