A depth-averaged two-phase model for debris flows over fixed beds
文献类型：期刊论文
| 作者 | Li, Ji1; Cao, Zhixian1,2; Hu, Kaiheng3 ; Pender, Gareth2; Liu, Qingquan4
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| 刊名 | INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 33期号:4页码:462-477 |
| 关键词 | Debris flow Two-phase model Depth-averaged model Fluctuation kinetic energy Multi grain sizes |
| ISSN号 | 1001-6279 |
| DOI | 10.1016/j.ijsrc.2017.06.003 |
| 通讯作者 | Cao, Zhixian(zxcao@whu.edu.cn) |
| 英文摘要 | A depth-averaged two-phase model is proposed for debris flows over fixed beds, explicitly incorporating interphase and particle-particle interactions, fluid and solid fluctuations and multi grain sizes. A first-order model based on the kinetic theory of granular flows is employed to determine the stresses due to solid fluctuations, while the turbulent kinetic energy - dissipation rate model is used to determine the stresses from fluid fluctuations. A well-balanced numerical algorithm is applied to solve the governing equations. The present model is benchmarked against USGS experimental debris flows over fixed beds. Incorporating the stresses due to fluid and solid fluctuations and properly estimating the bed shear stresses are shown to be crucial for reproducing the debris flows. Longitudinal particle segregation is resolved, demonstrating coarser sediments around the fronts and finer grains trailing the head. Based on extended modeling exercises, debris flow efficiency is shown to increase with initial volume, which is underpinned by observed datasets. (C) 2017 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved. |
| WOS关键词 | FREE-SURFACE FLOWS ; PARTICLE-SIZE SEGREGATION ; GRANULAR-LIQUID MIXTURES ; SEDIMENT TRANSPORT ; JIANGJIA RAVINE ; MASS FLOWS ; AVALANCHES ; RUNOUT ; FLUIDIZATION ; GRAVITY |
| 资助项目 | Natural Science Foundation of China[51279144] ; Natural Science Foundation of China[11432015] ; Chinese Academy of Sciences[KZZD-EW-05-01-03] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000448207900008 |
| 出版者 | IRTCES |
| 资助机构 | Natural Science Foundation of China ; Chinese Academy of Sciences |
| 源URL | [http://ir.imde.ac.cn/handle/131551/24362]  |
| 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 | Cao, Zhixian |
| 作者单位 | 1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China 2.Heriot Watt Univ, Inst Infrastruct & Environm, Edinburgh Campus, Edinburgh EH14 4AS, Midlothian, Scotland 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 4.Beijing Inst Technol, Dept Mech, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ji,Cao, Zhixian,Hu, Kaiheng,et al. A depth-averaged two-phase model for debris flows over fixed beds[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2018,33(4):462-477. |
| APA | Li, Ji,Cao, Zhixian,Hu, Kaiheng,Pender, Gareth,&Liu, Qingquan.(2018).A depth-averaged two-phase model for debris flows over fixed beds.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,33(4),462-477. |
| MLA | Li, Ji,et al."A depth-averaged two-phase model for debris flows over fixed beds".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 33.4(2018):462-477. |
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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