Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM

doi:10.1061/(ASCE)GM.1943-5622.0001520

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM
	Zou Yuhua1 ; Chen Chen 2; Zhang Limin 3
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2020
卷号	20 期号:1 页码:4019135
关键词	Internal erosion Suffusion Seepage Discrete-element method Fluid-solid coupling
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0001520
产权排序	1
文献子类	Article
英文摘要	Loss 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.
电子版国际标准刊号	1943-5622
语种	英语
WOS记录号	WOS:000497651200004
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33464]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Zhang Limin
作者单位	1.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
推荐引用方式 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.