The role of fluid viscosity in an immersed granular collapse

Geng Chao Yang; Chung Yee Kwok; Yuri Dumaresq Sobral

doi:10.1051/epjconf/201714009037

The role of fluid viscosity in an immersed granular collapse

Geng Chao Yang
, Chung Yee Kwok
, Yuri Dumaresq Sobral

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

1 Downloads (CityUHK Scholars)

Abstract

Instabilities of immersed slopes and cliffs can lead to catastrophic events that involve a sudden release of huge soil mass. The scaled deposit height and runout distance are found to follow simple power laws when a granular column collapses on a horizontal plane. However, if the granular column is submerged in a fluid, the mobility of the granular collapse due to high inertia effects will be reduced by fluid-particle interactions. In this study, the effects of fluid viscosity on granular collapse is investigated qualitatively by adopting a numerical approach based on the coupled lattice Boltzmann method (LBM) and discrete element method (DEM). It is found that the granular collapse can be dramatically slowed down due to the presence of viscous fluids. For the considered granular configuration, when the fluid viscosity increases. the runout distance decreases and the final deposition shows a larger deposit angle. © The Authors, published by EDP Sciences, 2017.

Original language	English
Article number	09037
Journal	EPJ Web of Conferences
Volume	140
DOIs	https://doi.org/10.1051/epjconf/201714009037
Publication status	Published - 30 Jun 2017
Externally published	Yes
Event	8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017 - Montpellier, France Duration: 3 Jul 2017 → 7 Jul 2017

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "The role of fluid viscosity in an immersed granular collapse",

abstract = "Instabilities of immersed slopes and cliffs can lead to catastrophic events that involve a sudden release of huge soil mass. The scaled deposit height and runout distance are found to follow simple power laws when a granular column collapses on a horizontal plane. However, if the granular column is submerged in a fluid, the mobility of the granular collapse due to high inertia effects will be reduced by fluid-particle interactions. In this study, the effects of fluid viscosity on granular collapse is investigated qualitatively by adopting a numerical approach based on the coupled lattice Boltzmann method (LBM) and discrete element method (DEM). It is found that the granular collapse can be dramatically slowed down due to the presence of viscous fluids. For the considered granular configuration, when the fluid viscosity increases. the runout distance decreases and the final deposition shows a larger deposit angle. {\textcopyright} The Authors, published by EDP Sciences, 2017.",

author = "Yang, \{Geng Chao\} and Kwok, \{Chung Yee\} and Sobral, \{Yuri Dumaresq\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].; 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017 ; Conference date: 03-07-2017 Through 07-07-2017",

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TY - JOUR

T1 - The role of fluid viscosity in an immersed granular collapse

AU - Yang, Geng Chao

AU - Kwok, Chung Yee

AU - Sobral, Yuri Dumaresq

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2017/6/30

Y1 - 2017/6/30

N2 - Instabilities of immersed slopes and cliffs can lead to catastrophic events that involve a sudden release of huge soil mass. The scaled deposit height and runout distance are found to follow simple power laws when a granular column collapses on a horizontal plane. However, if the granular column is submerged in a fluid, the mobility of the granular collapse due to high inertia effects will be reduced by fluid-particle interactions. In this study, the effects of fluid viscosity on granular collapse is investigated qualitatively by adopting a numerical approach based on the coupled lattice Boltzmann method (LBM) and discrete element method (DEM). It is found that the granular collapse can be dramatically slowed down due to the presence of viscous fluids. For the considered granular configuration, when the fluid viscosity increases. the runout distance decreases and the final deposition shows a larger deposit angle. © The Authors, published by EDP Sciences, 2017.

AB - Instabilities of immersed slopes and cliffs can lead to catastrophic events that involve a sudden release of huge soil mass. The scaled deposit height and runout distance are found to follow simple power laws when a granular column collapses on a horizontal plane. However, if the granular column is submerged in a fluid, the mobility of the granular collapse due to high inertia effects will be reduced by fluid-particle interactions. In this study, the effects of fluid viscosity on granular collapse is investigated qualitatively by adopting a numerical approach based on the coupled lattice Boltzmann method (LBM) and discrete element method (DEM). It is found that the granular collapse can be dramatically slowed down due to the presence of viscous fluids. For the considered granular configuration, when the fluid viscosity increases. the runout distance decreases and the final deposition shows a larger deposit angle. © The Authors, published by EDP Sciences, 2017.

UR - https://www.scopus.com/pages/publications/85024110876

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85024110876&origin=recordpage

U2 - 10.1051/epjconf/201714009037

DO - 10.1051/epjconf/201714009037

M3 - RGC 21 - Publication in refereed journal

SN - 2101-6275

VL - 140

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 09037

T2 - 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017

Y2 - 3 July 2017 through 7 July 2017

ER -

The role of fluid viscosity in an immersed granular collapse

Abstract

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