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Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM
Zou Yuhua1; Chen Chen2; Zhang Limin3
2020
Source PublicationINTERNATIONAL JOURNAL OF GEOMECHANICS
ISSN1532-3641
EISSN1943-5622
Volume20Issue:1Pages:4019135
SubtypeArticle
Contribution Rank1
AbstractLoss of fine particles or suffusion in soils induced by seepage is an important problem that may cause dam or dike failures. This paper aims to study the evolution mechanisms of suffusion in gap-graded sandy gravels using coupled computational fluid dynamics and discrete-element method (CFD-DEM). In the simulation, five groups of sandy gravel including four groups of gap-graded sandy gravel and a benchmark linearly graded sandy gravel were studied. Changes in flow rate, evolution of porosity in different layers, and spatial and temporal redistributions of particles in the samples during suffusion under upward seepage were studied. Simulation results show that when the fine particle content is the same, the total fine erosion ratio is larger when the stability index (H/F)min of the gap-graded sandy gravel is lower. The porosities of five layers of the gap-graded sandy gravel change continuously with infiltration time. A slight decrease in the fine grain content appears in the upper layers, while a sharp reduction in the fine grain content occurs in the bottom layer. The study provides a mechanics basis for the prediction and prevention of suffusion in gap-graded sandy gravels. (c) 2019 American Society of Civil Engineers.
KeywordInternal erosion Suffusion Seepage Discrete-element method Fluid-solid coupling
DOI10.1061/(ASCE)GM.1943-5622.0001520
Indexed BySCI
Language英语
WOS IDWOS:000497651200004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33464
Collection山地灾害与地表过程重点实验室
Corresponding AuthorZhang Limin
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China;
2.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China;
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Clear Water Bay, Hong Kong, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zou Yuhua,Chen Chen,Zhang Limin. Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2020,20(1):4019135.
APA Zou Yuhua,Chen Chen,&Zhang Limin.(2020).Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM.INTERNATIONAL JOURNAL OF GEOMECHANICS,20(1),4019135.
MLA Zou Yuhua,et al."Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM".INTERNATIONAL JOURNAL OF GEOMECHANICS 20.1(2020):4019135.
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