The effect of particle shape on the collapse characteristics of granular columns via the DEM
文献类型：期刊论文
| 作者 | Gong, Jian1,2,3; Cheng, Lipo2; Liu, Ming4; Jiang, Jie2; Ou, Xiaoduo2 |
| 刊名 | ADVANCED POWDER TECHNOLOGY
 |
| 出版日期 | 2024 |
| 卷号 | 35期号:1页码:15 |
| 关键词 | Granular column collapse Particle shape DEM Energy evolution Coordination number |
| ISSN号 | 0921-8831 |
| DOI | 10.1016/j.apt.2023.104283 |
| 英文摘要 | Granular flows that are composed of coarse solid particles are common in catastrophic events, such as landslides, rock avalanches, pyroclastic flows, or even turbidity currents. Understanding their complex dynamics is thus a key concern for risk assessment. The goal of the analyses in this study is to investigate the effects of particle shape on two-dimensional granular column collapses via the discrete element method (DEM). Specifically, three different particle shape types are constructed through three shape parameters (i.e., Sphericity S, Angularity a and roughness k), the granular column mobility R* changes regularly with the evolution of the shape parameters at a specific aspect ratio. We investigate the effects of particle shape on the collapse of granular columns using a method that first selects an extreme shape and then transitions through a series shape evolution. Using this method, particle shape is shown to have an important effect on deposition morphology, energy evolution and the mechanical coordination number. Furthermore, the shape parameters that have the strongest impacts on granular column collapse are shown to be S and a, which can be used as macroscale factors to describe particle shape. Also, k, which is a microscale factor that describes the particle surface, is shown to have a weaker influence. This study provides useful insights into the fluidity response of particle shape on granular column collapse. (c) 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[51809292] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021007] ; China Postdoctoral Science Foundation[2022MD723786] ; Guangxi Science and Technology Base and Talent Project[2021AC19244] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001127674800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40119]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Ou, Xiaoduo |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Guangxi Univ, Sch Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China 3.Hualan Design & Consulting Grp, Nanning 530011, Guangxi, Peoples R China 4.CCCC First Harbor Engn Co Ltd, Tianjin 300461, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong, Jian,Cheng, Lipo,Liu, Ming,et al. The effect of particle shape on the collapse characteristics of granular columns via the DEM[J]. ADVANCED POWDER TECHNOLOGY,2024,35(1):15. |
| APA | Gong, Jian,Cheng, Lipo,Liu, Ming,Jiang, Jie,&Ou, Xiaoduo.(2024).The effect of particle shape on the collapse characteristics of granular columns via the DEM.ADVANCED POWDER TECHNOLOGY,35(1),15. |
| MLA | Gong, Jian,et al."The effect of particle shape on the collapse characteristics of granular columns via the DEM".ADVANCED POWDER TECHNOLOGY 35.1(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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