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A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials

Min Wang, Y.T. Feng, G.N. Pande, T.T. Zhao, Yuntian Feng Orcid Logo

International Journal for Numerical and Analytical Methods in Geomechanics, Volume: 42, Issue: 12, Pages: 1405 - 1424

Swansea University Author: Yuntian Feng Orcid Logo

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DOI (Published version): 10.1002/nag.2799

Abstract

This paper presents a 3D bonded discrete element and lattice Boltzmann method for resolving the fluid‐solid interaction involving complicated fluid‐particle coupling in geomaterials. In the coupled technique, the solid material is treated as an assembly of bonded and/or granular particles. A bond mo...

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Published in: International Journal for Numerical and Analytical Methods in Geomechanics
ISSN: 03639061
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39984
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spelling 2018-08-06T10:00:41.0359728 v2 39984 2018-05-08 A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials d66794f9c1357969a5badf654f960275 0000-0002-6396-8698 Yuntian Feng Yuntian Feng true false 2018-05-08 CIVL This paper presents a 3D bonded discrete element and lattice Boltzmann method for resolving the fluid‐solid interaction involving complicated fluid‐particle coupling in geomaterials. In the coupled technique, the solid material is treated as an assembly of bonded and/or granular particles. A bond model accounting for strain softening in normal contact is incorporated into the discrete element method to simulate the mechanical behaviour of geomaterials, whilst the fluid flow is solved by the lattice Boltzmann method based on kinetic theory and statistical mechanics. To provide a bridge between theory and application, a 3D algorithm of immersed moving boundary scheme was proposed for resolving fluid‐particle interaction. To demonstrate the applicability and accuracy of this coupled method, a benchmark called quicksand, in which particles become fluidised under the driving of upward fluid flow, is first carried out. The critical hydraulic gradient obtained from the numerical results matches the theoretical value. Then, numerical investigation of the performance of granular filters generated according to the well‐acknowledged design criteria is given. It is found that the proposed 3D technique is promising, and the instantaneous migration of the protected soils can be readily observed. Numerical results prove that the filters which comply with the design criteria can effectively alleviate or eliminate the appearance of particle erosion in dams. Journal Article International Journal for Numerical and Analytical Methods in Geomechanics 42 12 1405 1424 03639061 31 12 2018 2018-12-31 10.1002/nag.2799 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2018-08-06T10:00:41.0359728 2018-05-08T08:59:18.4532865 College of Engineering Engineering Min Wang 1 Y.T. Feng 2 G.N. Pande 3 T.T. Zhao 4 Yuntian Feng 0000-0002-6396-8698 5 0039984-08052018090526.pdf wang2018(3).pdf 2018-05-08T09:05:26.6030000 Output 1004252 application/pdf Accepted Manuscript true 2019-05-28T00:00:00.0000000 true eng
title A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
spellingShingle A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
Yuntian Feng
title_short A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
title_full A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
title_fullStr A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
title_full_unstemmed A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
title_sort A coupled 3-dimensional bonded discrete element and lattice Boltzmann method for fluid-solid coupling in cohesive geomaterials
author_id_str_mv d66794f9c1357969a5badf654f960275
author_id_fullname_str_mv d66794f9c1357969a5badf654f960275_***_Yuntian Feng
author Yuntian Feng
author2 Min Wang
Y.T. Feng
G.N. Pande
T.T. Zhao
Yuntian Feng
format Journal article
container_title International Journal for Numerical and Analytical Methods in Geomechanics
container_volume 42
container_issue 12
container_start_page 1405
publishDate 2018
institution Swansea University
issn 03639061
doi_str_mv 10.1002/nag.2799
college_str College of Engineering
hierarchytype
hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
active_str 0
description This paper presents a 3D bonded discrete element and lattice Boltzmann method for resolving the fluid‐solid interaction involving complicated fluid‐particle coupling in geomaterials. In the coupled technique, the solid material is treated as an assembly of bonded and/or granular particles. A bond model accounting for strain softening in normal contact is incorporated into the discrete element method to simulate the mechanical behaviour of geomaterials, whilst the fluid flow is solved by the lattice Boltzmann method based on kinetic theory and statistical mechanics. To provide a bridge between theory and application, a 3D algorithm of immersed moving boundary scheme was proposed for resolving fluid‐particle interaction. To demonstrate the applicability and accuracy of this coupled method, a benchmark called quicksand, in which particles become fluidised under the driving of upward fluid flow, is first carried out. The critical hydraulic gradient obtained from the numerical results matches the theoretical value. Then, numerical investigation of the performance of granular filters generated according to the well‐acknowledged design criteria is given. It is found that the proposed 3D technique is promising, and the instantaneous migration of the protected soils can be readily observed. Numerical results prove that the filters which comply with the design criteria can effectively alleviate or eliminate the appearance of particle erosion in dams.
published_date 2018-12-31T04:06:56Z
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score 10.871765