Numerical investigation of reverse segregation in debris flows by DEM
文献类型：会议论文
| 作者 | Zhou Gordon G. D.1,2; Ng, Charles W. W.2 |
| 出版日期 | 2010 |
| 会议日期 | OCT 10-12, 2010 |
| 会议地点 | Shanghai |
| 关键词 | Discrete element method Dry granular flow Reverse segregation Flow regime |
| 卷号 | 12 |
| 期号 | 5 |
| DOI | 10.1007/s10035-010-0209-4 |
| 页码 | 507-516 |
| 国家 | PEOPLES R CHINA |
| 英文摘要 | Studies of the mechanisms and the effects on the flowing mobility for hazardous geophysical flows (e.g., debris flows) is crucial for hazard mitigation and prediction. Granular flows with grains of mixed sizes are numerically modeled and the contact behavior of solid particles is fundamentally studied using the discrete element method. The mechanical effects of particle contacts (shearing and collision) are contrasted with geometrical effects (kinetic sieving) to explain the mechanism of reverse segregation. Compared to granular flows with uniform solid particles, the effect of segregation on granular flowing mobility is investigated. It is found that reverse segregation can significantly influence the flowing mobility and the flowing regimes in the front head of the granular body. A mechanical explanation of the segregation mechanism can be presented by a new dimensionless number, which is correlated with the contact force. |
| 源文献作者 | GRANULAR MATTER |
| 产权排序 | 2 |
| 会议录 | GRANULAR MATTER
 |
| 语种 | 英语 |
| 电子版国际标准刊号 | 1434-7636 |
| ISSN号 | 1434-5021 |
| WOS记录号 | WOS:000282594400007 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/34168]  |
| 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 | Zhou Gordon G. D. |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhou Gordon G. D.,Ng, Charles W. W.. Numerical investigation of reverse segregation in debris flows by DEM[C]. 见:. Shanghai. OCT 10-12, 2010. |
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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