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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EDP Sciences
2021-01-01
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| 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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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 |
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AT macaulaymatthew shearinduceddiffusiontheroleofgranularclusters AT rognonpierre shearinduceddiffusiontheroleofgranularclusters |
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