Shear-induced diffusion: the role of granular clusters

This paper is concerned with the physical mechanisms controlling shear-induced diffusion in dense granular flows. The starting point is that of the granular random walk occurring in diluted granular flows, which underpins Bagnold’s scaling relating the coefficient of self-diffusion to the grain size...

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Main Authors: Macaulay Matthew, Rognon Pierre
Format: Article
Language:English
Published: EDP Sciences 2021-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_03035.pdf
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spelling doaj-61d4465d938e4559bbd50ddef532f97d2021-08-02T22:39:03ZengEDP SciencesEPJ Web of Conferences2100-014X2021-01-012490303510.1051/epjconf/202124903035epjconf_pg2021_03035Shear-induced diffusion: the role of granular clustersMacaulay Matthew0Rognon Pierre1Particles and Grains laboratory, School of Civil Engineering, The University of Sydney.Particles and Grains laboratory, School of Civil Engineering, The University of Sydney.This paper is concerned with the physical mechanisms controlling shear-induced diffusion in dense granular flows. The starting point is that of the granular random walk occurring in diluted granular flows, which underpins Bagnold’s scaling relating the coefficient of self-diffusion to the grain size and shear rate. By means of DEM simulations of plane shear flows, we measure some deviations from this scaling in dense granular flows with and without contact adhesion. We propose to relate these deviations to the development of correlated motion of grains in these flows, which impacts the magnitude of grain velocity fluctuations and their time persistence.https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_03035.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Macaulay Matthew
Rognon Pierre
spellingShingle Macaulay Matthew
Rognon Pierre
Shear-induced diffusion: the role of granular clusters
EPJ Web of Conferences
author_facet Macaulay Matthew
Rognon Pierre
author_sort Macaulay Matthew
title Shear-induced diffusion: the role of granular clusters
title_short Shear-induced diffusion: the role of granular clusters
title_full Shear-induced diffusion: the role of granular clusters
title_fullStr Shear-induced diffusion: the role of granular clusters
title_full_unstemmed Shear-induced diffusion: the role of granular clusters
title_sort shear-induced diffusion: the role of granular clusters
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2021-01-01
description This paper is concerned with the physical mechanisms controlling shear-induced diffusion in dense granular flows. The starting point is that of the granular random walk occurring in diluted granular flows, which underpins Bagnold’s scaling relating the coefficient of self-diffusion to the grain size and shear rate. By means of DEM simulations of plane shear flows, we measure some deviations from this scaling in dense granular flows with and without contact adhesion. We propose to relate these deviations to the development of correlated motion of grains in these flows, which impacts the magnitude of grain velocity fluctuations and their time persistence.
url https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_03035.pdf
work_keys_str_mv AT macaulaymatthew shearinduceddiffusiontheroleofgranularclusters
AT rognonpierre shearinduceddiffusiontheroleofgranularclusters
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