Numerical investigation of reverse segregation in debris flows by DEM
文献类型：期刊论文
| 作者 | Zhou GD(周公旦)
|
| 刊名 | Granular Matter
 |
| 出版日期 | 2010-09-11 |
| 卷号 | 5期号:12页码:507-516 |
| 关键词 | Discrete element method Dry granular flow Reverse segregation Flow regime |
| 通讯作者 | 周公旦 |
| 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. |
| 学科主题 | 自然地理学 ; 工程力学 ; 计算机应用 |
| 分类号 | TB3 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2012-12-10 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4406]  |
| 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 |
| 推荐引用方式 GB/T 7714 | Zhou GD. Numerical investigation of reverse segregation in debris flows by DEM[J]. Granular Matter,2010,5(12):507-516. |
| APA | Zhou GD.(2010).Numerical investigation of reverse segregation in debris flows by DEM.Granular Matter,5(12),507-516. |
| MLA | Zhou GD."Numerical investigation of reverse segregation in debris flows by DEM".Granular Matter 5.12(2010):507-516. |
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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