Rearrangements in a two-dimensional packing of disks

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Several aspects of the dynamics of a granular two-dimensional (2D) packing of disks slowly tilted until the system loses stability and an avalanche takes place are discussed. The evolution of the system, constructed with monodisperse disks placed on a thin cell, is studied by image analysis. As in t...

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Autores principales:	Aguirre, M.A., Calvo, A., Ippolito, I., Medus, A., Mancuso, M.
Formato:	JOUR
Materias:	Image analysis Packing Surface phenomena System stability Velocity measurement Avalanche Disks Thin cells Granular materials
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_15393755_v73_n4_p_Aguirre
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_15393755_v73_n4_p_Aguirre
record_format	dspace
spelling	todo:paper_15393755_v73_n4_p_Aguirre2023-10-03T16:22:10Z Rearrangements in a two-dimensional packing of disks Aguirre, M.A. Calvo, A. Ippolito, I. Medus, A. Mancuso, M. Image analysis Packing Surface phenomena System stability Velocity measurement Avalanche Disks Thin cells Granular materials Several aspects of the dynamics of a granular two-dimensional (2D) packing of disks slowly tilted until the system loses stability and an avalanche takes place are discussed. The evolution of the system, constructed with monodisperse disks placed on a thin cell, is studied by image analysis. As in the 3D case (packing of spheres), the system undergoes several rearrangements of different magnitude before the avalanche takes place. For thick systems, not only are small rearrangements detected but also displacements of large clusters of disks are observed in the bulk and on the free surface of the packing. In particular, characteristic angles and the avalanche mass were determined for samples of different heights. On thick systems, velocity fields of large rearrangements are presented and changes in the internal structure of the packing produced by these rearrangements are analyzed. It is found that the main effects of rearrangements is to increase the disorder of the system. Also, as the disorder of the system increases its stability threshold decreases. © 2006 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15393755_v73_n4_p_Aguirre
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Image analysis Packing Surface phenomena System stability Velocity measurement Avalanche Disks Thin cells Granular materials
spellingShingle	Image analysis Packing Surface phenomena System stability Velocity measurement Avalanche Disks Thin cells Granular materials Aguirre, M.A. Calvo, A. Ippolito, I. Medus, A. Mancuso, M. Rearrangements in a two-dimensional packing of disks
topic_facet	Image analysis Packing Surface phenomena System stability Velocity measurement Avalanche Disks Thin cells Granular materials
description	Several aspects of the dynamics of a granular two-dimensional (2D) packing of disks slowly tilted until the system loses stability and an avalanche takes place are discussed. The evolution of the system, constructed with monodisperse disks placed on a thin cell, is studied by image analysis. As in the 3D case (packing of spheres), the system undergoes several rearrangements of different magnitude before the avalanche takes place. For thick systems, not only are small rearrangements detected but also displacements of large clusters of disks are observed in the bulk and on the free surface of the packing. In particular, characteristic angles and the avalanche mass were determined for samples of different heights. On thick systems, velocity fields of large rearrangements are presented and changes in the internal structure of the packing produced by these rearrangements are analyzed. It is found that the main effects of rearrangements is to increase the disorder of the system. Also, as the disorder of the system increases its stability threshold decreases. © 2006 The American Physical Society.
format	JOUR
author	Aguirre, M.A. Calvo, A. Ippolito, I. Medus, A. Mancuso, M.
author_facet	Aguirre, M.A. Calvo, A. Ippolito, I. Medus, A. Mancuso, M.
author_sort	Aguirre, M.A.
title	Rearrangements in a two-dimensional packing of disks
title_short	Rearrangements in a two-dimensional packing of disks
title_full	Rearrangements in a two-dimensional packing of disks
title_fullStr	Rearrangements in a two-dimensional packing of disks
title_full_unstemmed	Rearrangements in a two-dimensional packing of disks
title_sort	rearrangements in a two-dimensional packing of disks
url	http://hdl.handle.net/20.500.12110/paper_15393755_v73_n4_p_Aguirre
work_keys_str_mv	AT aguirrema rearrangementsinatwodimensionalpackingofdisks AT calvoa rearrangementsinatwodimensionalpackingofdisks AT ippolitoi rearrangementsinatwodimensionalpackingofdisks AT medusa rearrangementsinatwodimensionalpackingofdisks AT mancusom rearrangementsinatwodimensionalpackingofdisks
_version_	1807323902726111232

Rearrangements in a two-dimensional packing of disks

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