Visco-Collisional Scaling Law of Flow Resistance and Its Application in Debris-Flow Mobility
文献类型：期刊论文
| 作者 | Chen, Qian1,2; Song, Dongri1,2 ; Chen, Xiaoqing1,2; Zhong, Wei1,2
|
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 128期号:2页码:22 |
| ISSN号 | 2169-9003 |
| 关键词 | visco-collisional effect flow resistance Manning formula flow regime debris flow debris-flow mobility |
| DOI | 10.1029/2022JF006712 |
| 通讯作者 | Song, Dongri(drsong@imde.ac.cn) |
| 英文摘要 | Flow resistance against gravity-driven forces is a key factor controlling debris-flow mobility, which is an important parameter for hazard risk assessment. In practice, Manning's formula is widely used for debris-flow mobility analysis. However, this formula depends on the boundary conditions (channel roughness) and neglects the physical mechanisms of debris flow. Based on the systematic analysis of the field observation data of 93 debris-flow events at Jiangjia Ravine (Yunnan Province, China), this study investigates the dynamic mechanisms and sources of flow resistance of debris flow. As the flows tend to be liquefied, the fluid viscous effect and particle collisions are the main sources of flow resistance. Flow resistance can be described by a visco-collisional scaling law. Under fixed channel boundary conditions, this law is further incorporated into Manning's formula, bridging the gap between the resistance model based on physical mechanisms and the empirical formula of flow resistance. The modified Manning's coefficient is closely related to flow regimes, giving Manning's coefficient an explicit physical meaning. The modified Manning's coefficient provides a more reasonable basis for the mobility analysis and risk assessment of debris flow. |
| WOS关键词 | MODEL ; SUSPENSION ; INITIATION ; RHEOLOGY ; BEHAVIOR |
| 资助项目 | National Natural Science Foundation of China[41925030] ; National Natural Science Foundation of China[42077256] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:001000238700003 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imde.ac.cn/handle/131551/57553]  |
| 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 | Song, Dongri |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Qian,Song, Dongri,Chen, Xiaoqing,et al. Visco-Collisional Scaling Law of Flow Resistance and Its Application in Debris-Flow Mobility[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,2023,128(2):22. |
| APA | Chen, Qian,Song, Dongri,Chen, Xiaoqing,&Zhong, Wei.(2023).Visco-Collisional Scaling Law of Flow Resistance and Its Application in Debris-Flow Mobility.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,128(2),22. |
| MLA | Chen, Qian,et al."Visco-Collisional Scaling Law of Flow Resistance and Its Application in Debris-Flow Mobility".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 128.2(2023):22. |
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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