Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns

We simulate, via a discrete element method, the tapping of a narrow column of disks under gravity. For frictionless disks, this system has a simple analytical expression for the density of states in the Edwards volume ensemble. We compare the predictions of the ensemble at constant compactivity agai...

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Autores principales: Irastorza, Ramiro, Carlevaro, Manuel, Pugnaloni, Luis
Formato: Documento de conferencia publishedVersion docunento de conferencia
Lenguaje:Inglés
Publicado: Journal of Statistical Mechanics: Theory and Experiment 2018
Materias:
Edwards ensemble; realistic simulations; tapped; narrow; two dimensional; granular columns
Acceso en línea:http://hdl.handle.net/20.500.12272/2798
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2798
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic Edwards ensemble; realistic simulations; tapped; narrow; two dimensional; granular columns
spellingShingle Edwards ensemble; realistic simulations; tapped; narrow; two dimensional; granular columns
Irastorza, Ramiro
Carlevaro, Manuel
Pugnaloni, Luis
Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
topic_facet Edwards ensemble; realistic simulations; tapped; narrow; two dimensional; granular columns
description We simulate, via a discrete element method, the tapping of a narrow column of disks under gravity. For frictionless disks, this system has a simple analytical expression for the density of states in the Edwards volume ensemble. We compare the predictions of the ensemble at constant compactivity against the results for the steady states obtained in the simulations. We show that the steady states cannot be properly described since the microstates sampled are not in correspondence with the predicted distributions, suggesting that the postulates of flat measure and ergodicity are, either or both, invalid for this simple realization of a static granular system. However, we show that certain qualitative features of the volume fluctuations which are difficult to predict from simple arguments are captured by the theory.
format Documento de conferencia
publishedVersion
docunento de conferencia
author Irastorza, Ramiro
Carlevaro, Manuel
Pugnaloni, Luis
author_facet Irastorza, Ramiro
Carlevaro, Manuel
Pugnaloni, Luis
author_sort Irastorza, Ramiro
title Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
title_short Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
title_full Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
title_fullStr Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
title_full_unstemmed Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
title_sort exact predictions from edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
publisher Journal of Statistical Mechanics: Theory and Experiment
publishDate 2018
url http://hdl.handle.net/20.500.12272/2798
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AT pugnaloniluis exactpredictionsfromedwardsensemblevsrealisticsimulationsoftappednarrowtwodimensionalgranularcolumns
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