Discrete element analysis of dry granular flow impact on slit dams
文献类型：期刊论文
| 作者 | Gong Sixia3; Zhao Tao3; Zhao Jidong1,2; Dai Feng4; Zhou Gordon G. D.1 |
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2020 |
| 页码 | DOI: 10.1007/s10346-020-01531-2 |
| 关键词 | Dry granular flow Slit dam Discrete element method Particle clump Trapping efficiency |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-020-01531-2 |
| 产权排序 | 3 |
| 文献子类 | Article; Early Access |
| 英文摘要 | Slit dam is an open-check barrier structure widely used in mountainous regions to resist the destructive impacts of granular flows. To examine the dynamics of granular flow impact on slit dams, a numerical study by discrete element method (DEM) is presented in this article. The study considers dry granular materials flowing down a flume channel and interacts with slit dams installed at the lower section of the flume. The particle shape is explicitly considered by particle clumps of various aspect ratios. The slit dams are modeled as rigid and smooth rectangular prisms uniformly spaced at in the flume. Four key stages of granular flow impact on the slit dams have been identified, namely, the frontal impact, run up, pile up, and static deposition stages. In the impact process, the kinetic energy of the granular flow is dissipated primarily by interparticle friction and damping. The trapping efficiency of the slit dams decreases exponentially with the relative post spacing, while it increases with the particle clump aspect ratio. The numerical results can provide new insights into the optimization of relative post spacing for slit dam design. |
| 电子版国际标准刊号 | 1612-5118 |
| 语种 | 英语 |
| WOS记录号 | WOS:000572314400001 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/46285]  |
| 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 | Zhao Tao |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Conservancy, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Peoples R China; 2.Brunel Univ London, Dept Civil & Environm Engn, London UB8 3PH, England; 3.Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China; 4.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Clear Water Bay, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong Sixia,Zhao Tao,Zhao Jidong,et al. Discrete element analysis of dry granular flow impact on slit dams[J]. LANDSLIDES,2020:DOI: 10.1007/s10346-020-01531-2. |
| APA | Gong Sixia,Zhao Tao,Zhao Jidong,Dai Feng,&Zhou Gordon G. D..(2020).Discrete element analysis of dry granular flow impact on slit dams.LANDSLIDES,DOI: 10.1007/s10346-020-01531-2. |
| MLA | Gong Sixia,et al."Discrete element analysis of dry granular flow impact on slit dams".LANDSLIDES (2020):DOI: 10.1007/s10346-020-01531-2. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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