A 2D DEM-LBM study on soil behaviour due to locally injected fluid

Leakage from underground pipes could result in foundations being undermined and cause damage to adjacent infrastructure. Soil particles surrounding the leaking area could be mobilised, displaced, and even washed out of the soil matrix by the leaking fluid, generating a void or cavity. A two-dimensio...

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Bibliographic Details
Published inParticuology Vol. 10; no. 2; pp. 242 - 252
Main Authors Cui, Xilin, Li, Jun, Chan, Andrew, Chapman, David
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2012
School of Civil Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
Subjects
Cohesive particles
Computational fluid dynamics
Discrete element method
Fluid flow
Fluids
Granular bed
Holes
Lattice Boltzmann method
Locally injected fluid
Pipe
Soil (material)
Surface energy
Two dimensional
二维
土壤颗粒
基础设施
数字高程模型
格子Boltzmann方法
注射液
管道泄漏
行为
Discrete element method
Lattice Boltzmann method
Locally injected fluid
Granular bed
Surface energy
Cohesive particles
Online AccessGet full text
ISSN1674-2001
2210-4291
DOI10.1016/j.partic.2011.10.002

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Summary:Leakage from underground pipes could result in foundations being undermined and cause damage to adjacent infrastructure. Soil particles surrounding the leaking area could be mobilised, displaced, and even washed out of the soil matrix by the leaking fluid, generating a void or cavity. A two-dimensional simulation using a coupled discrete element method and lattice Boltzmann method （DEM-LBM） has been used to investigate the behaviour of a soil bed subject to a locally injected fluid, which represents a leak in a pipe. Various values of inter-particle surface energy were also adopted to model the mechanical effects of cohesive particles. The results suggest that the inter-particle surface energy greatly influences the bed response with respect to the leaking fluid, including the excess pressure initiating the cavity, the cavity shape and its evolution rate.
Bibliography:11-5671/O3
Discrete element methodLattice Boltzmann methodGranular bedLocally injected fluidCohesive particlesSurface energy
Leakage from underground pipes could result in foundations being undermined and cause damage to adjacent infrastructure. Soil particles surrounding the leaking area could be mobilised, displaced, and even washed out of the soil matrix by the leaking fluid, generating a void or cavity. A two-dimensional simulation using a coupled discrete element method and lattice Boltzmann method （DEM-LBM） has been used to investigate the behaviour of a soil bed subject to a locally injected fluid, which represents a leak in a pipe. Various values of inter-particle surface energy were also adopted to model the mechanical effects of cohesive particles. The results suggest that the inter-particle surface energy greatly influences the bed response with respect to the leaking fluid, including the excess pressure initiating the cavity, the cavity shape and its evolution rate.
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ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2011.10.002