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Segregation-Induced Flow Transitions in Rock-Ice Mixtures: Implications for Rock-Ice Avalanche Dynamics

文献类型：期刊论文

作者Zhou, Gordon G. D.5,6,7; Cui, Kahlil F. E.6,7; Jing, Lu4; Mangeney, Anne3; Cui, Yifei2; Huang, Yu1; Chen, Xiaoqing5,6,7
刊名JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
出版日期2024-09-01
卷号129期号:9页码:17
关键词rock-ice avalanche size-density segregation discrete element method granular rheology friction
ISSN号2169-9003
DOI10.1029/2024JF007831
通讯作者Zhou, Gordon G. D.(gordon@imde.ac.cn) ; Cui, Kahlil F. E.(kfcui@imde.ac.cn)
英文摘要Global climate change has been intensifying the scale and frequency of rock-ice avalanches and similar catastrophic mass movements in high-mountain regions. The difference in the physical characteristics of rock and ice particles leads to mixing and segregation during flow. Although, both particle segregation and the presence of ice fundamentally alter flow behavior, the joint influence and feedback of these two aspects are overlooked in state-of-the-art rock-ice avalanche models. Using discrete element simulations, we show that by controlling the distribution of inter-particle frictional interactions within the mixture, segregation patterns resulting from the size, density, concentration, and surface friction differences of rock and ice phases can induce sharp velocity gradients along the flowing thickness. Flowing layers where low friction contacts with ice are abundant tend to flow faster and can induce slow creeping motion in an otherwise static basal layer dominated by more frictional rocks. Based on these observations, we find that the effective friction of rock-ice flows for various mixture concentrations and size ratios can be obtained as a sum of the single-phase rheologies of rocks and ice weighted according to their microscopic contact probabilities. This effective friction for rock-ice mixtures allows us to extend a recent non-local granular fluidity framework that captures the complex segregation-flow feedback mechanism in rock-ice flows. The findings provide a deeper micromechanical understanding of how particle interactions influence rock-ice avalanche mobility, which ultimately improves flow models needed for hazard assessment and mitigation.
WOS关键词PARTICLE SEGREGATION ; DENSITY SEGREGATION ; FRICTION ; SIZE ; RUNOUT ; MODEL
资助项目Ministry of Science and Technology of the People's Republic of China[2023YFC300830] ; Ministry of Science and Technology of the People's Republic of China[2023YFC3008302] ; National Key R&D Program of China[12250410257] ; National Natural Science Foundation of China[IMHE-ZDRW-03] ; Science and Technology Research Program of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences[ANSO-CR-KP-2021-07] ; Key Collaborative Research Program of the Alliance of International Science Organizations[2024NSFJQ0043] ; Sichuan Science and Technology Program
WOS研究方向Geology
语种英语
WOS记录号WOS:001318775900001
出版者AMER GEOPHYSICAL UNION
资助机构Ministry of Science and Technology of the People's Republic of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; Science and Technology Research Program of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences ; Key Collaborative Research Program of the Alliance of International Science Organizations ; Sichuan Science and Technology Program
源URL[http://ir.imde.ac.cn/handle/131551/58418]  
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.; Cui, Kahlil F. E.
作者单位1.Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai, Peoples R China
2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing, Peoples R China
3.Univ Paris Cite, Inst Phys Globe Paris, CNRS, UMR 7154, Paris, France
4.Tsinghua Univ, Inst Ocean Engn, Shenzhen Int Grad Sch, Shenzhen, Peoples R China
5.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Chengdu, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
7.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Engn Resiliences, Chengdu, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Gordon G. D.,Cui, Kahlil F. E.,Jing, Lu,et al. Segregation-Induced Flow Transitions in Rock-Ice Mixtures: Implications for Rock-Ice Avalanche Dynamics[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,2024,129(9):17.
APA Zhou, Gordon G. D..,Cui, Kahlil F. E..,Jing, Lu.,Mangeney, Anne.,Cui, Yifei.,...&Chen, Xiaoqing.(2024).Segregation-Induced Flow Transitions in Rock-Ice Mixtures: Implications for Rock-Ice Avalanche Dynamics.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,129(9),17.
MLA Zhou, Gordon G. D.,et al."Segregation-Induced Flow Transitions in Rock-Ice Mixtures: Implications for Rock-Ice Avalanche Dynamics".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 129.9(2024):17.

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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