| Simulating Progression of Internal Erosion in Gap-Graded Sandy Gravels Using Coupled CFD-DEM | |
Zou Yuhua1 ; Chen Chen2; Zhang Limin3
| |
| 2020 | |
| Source Publication | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| ISSN | 1532-3641 |
| EISSN | 1943-5622 |
| Volume | 20Issue:1Pages:4019135 |
| Subtype | Article |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | Internal erosion Suffusion Seepage Discrete-element method Fluid-solid coupling |
| DOI | 10.1061/(ASCE)GM.1943-5622.0001520 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000497651200004 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/33464 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Zhang Limin |
| Affiliation | 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 |
| 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| zou2020.pdf（3593KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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