Structures and non-equilibrium dynamics in granular media

Stefan Luding

doi:10.1016/S1631-0705(02)01308-7

Physique de la matière en grains/Physics of granular media

Structures and non-equilibrium dynamics in granular media

Stefan Luding ^1,²

¹ Institute for Computer Applications 1, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany
² DelftChemTech, TU Delft, Julianalaan 136, 2628 BL Delft, The Netherlands

Comptes Rendus. Physique, Volume 3 (2002) no. 2, pp. 153-161.

Résumé
Abstract

Dans les milieux granulaires, la dissipation conduit à des phénomènes intéressants comme la formation d'amas dans des états dynamiques hors-équilibre. A titre d'exemple, nous examinons la perte d'énergie et l'évolution des amas avec le temps d'un système qui se refroidit librement. De plus, nous analysons la distribution de probabilité de la fréquence de collision. Dans un système homogène, la fréquence de collision d'événements non corrélés conduit à une distribution de Poisson, alors que les phénomènes coopératifs sont caractérisés par une probabilité de collision par unité de temps qui décroı̂t comme une loi de puissance.

In granular media, dissipation leads to interesting phenomena like cluster formation in non-equilibrium dynamical states. As an example, the freely cooling system is examined concerning the energy decay and the cluster evolution with time. Furthermore, the probability distribution of the collision frequency is discussed. Uncorrelated events lead to a Poisson distribution for the collision frequencies in the homogeneous system, whereas cooperative phenomena can be related to a power-law decay of the collision probability per unit time.

Reçu le : 2001-09-14
Accepté le : 2001-12-11
Publié le : 2002-01-01

DOI : 10.1016/S1631-0705(02)01308-7

Keywords: inhomogeneous free cooling, clustering, cooperative phenomena, event-driven molecular dynamics
Mots-clés : refroidissement libre et inhomogène, phénomènes coopératifs, dynamique moléculaire gérée par les événements

Affiliations des auteurs :

Stefan Luding ^{1, 2}

¹ Institute for Computer Applications 1, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany
² DelftChemTech, TU Delft, Julianalaan 136, 2628 BL Delft, The Netherlands

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Stefan Luding. Structures and non-equilibrium dynamics in granular media. Comptes Rendus. Physique, Volume 3 (2002) no. 2, pp. 153-161. doi : 10.1016/S1631-0705(02)01308-7. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(02)01308-7/

Bibliographie
Cité par

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