Study of sediment transport in granular avalanches
文献类型：期刊论文
| 作者 | Zhou, G. G. D.1,2,3 ; Hu, K. H.1,2,3; Cui, P.1,2,3
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| 刊名 | JOURNAL OF FLOOD RISK MANAGEMENT
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 6期号:2页码:156-165 |
| 关键词 | Discrete element method (DEM) flow regime granular avalanche sediment transport solids discharge per unit width |
| ISSN号 | 1753-318X |
| 通讯作者 | 周公旦 |
| 英文摘要 | Understanding the characteristics and mechanics of granular avalanches along sloping channels is fundamental and vital for the study of different geophysical flows in the field. By using the discrete element method (DEM), three-dimensional (3D) granular (mass) flows along a sloping channel are numerically modelled to study the contact behaviour between solid particles. The evolution of 3D unsteady granular flows from a quasi-static state to an inertial flow is systematically investigated through numerical simulations. Captured velocity profiles along the flow height show variation in the flow regimes, while utilisation of the definition of the Savage number allows study of the vibration of solids inside a granular body along the sloping channels. These numerical results are compared with field measurements to observe the effect of channel confinement on the solids discharge per unit width of granular flows. This particulate study illustrates that, for unsteady granular flows, solid particles in the front head are more collision dominated, with shear rates and Savage numbers greatly enhanced. Also, the solids discharge inside a granular body is not uniformly distributed. Finally, channel width acts as a confinement to the granular debris flow, which can significantly affect sediment transport. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 学科主题 | 自然地理学 ; 水文地理学 |
| 类目[WOS] | Environmental Sciences ; Water Resources |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Water Resources |
| 关键词[WOS] | DEBRIS FLOWS ; SURFACE FLOWS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319067600010 |
| 公开日期 | 2012-12-10 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4401]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Minist Water Conservancy & Power, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, G. G. D.,Hu, K. H.,Cui, P.. Study of sediment transport in granular avalanches[J]. JOURNAL OF FLOOD RISK MANAGEMENT,2013,6(2):156-165. |
| APA | Zhou, G. G. D.,Hu, K. H.,&Cui, P..(2013).Study of sediment transport in granular avalanches.JOURNAL OF FLOOD RISK MANAGEMENT,6(2),156-165. |
| MLA | Zhou, G. G. D.,et al."Study of sediment transport in granular avalanches".JOURNAL OF FLOOD RISK MANAGEMENT 6.2(2013):156-165. |
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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