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Flow resistance in the transition from dense to dilute granular-fluid flows

文献类型：期刊论文

作者Song, D.2,3,4; Zhou, G. G. D.1,3,4; Chen, Q.3,4
刊名GRANULAR MATTER
出版日期2021-08-01
卷号23期号:3页码:11
ISSN号1434-5021
关键词Granular-fluid flow Debris flow Flow resistance Visco-collisional scaling Coulomb friction
DOI10.1007/s10035-021-01134-1
通讯作者Zhou, G. G. D.(gordon@imde.ac.cn)
英文摘要Substantial research work has been focusing on the flow resistance of dense granular-fluid geophysical flows, e.g., debris flows. However, the mechanism of flow resistance as the dense debris flows transition to the dilute debris flow range (volumetric solid concentration 60% to 40%) remains an unsolved problem. Based on the accurate measurements of normal/shear stresses and pore fluid pressure at the flume base, we analyze the flow resistance of a series of controlled debris flow model tests, covering the flow regime from friction dominated to viscous/collisional dominated. We find that the flow resistance, excluding the Coulomb frictional component, can be well described by a visco-collisional scaling relationship. The solid-fluid interaction in the dilute range would facilitate a quick rebalance against the gravity driven force in the transient flow condition. Finally, a heuristic model is proposed to unify the flow resistance for dense and dilute debris flows.
WOS关键词DEBRIS-FLOW ; DEPOSITIONAL MECHANISMS ; LANDSLIDE ; AVALANCHE ; PRESSURE ; BEHAVIOR ; RUNOUT ; MODEL ; MORPHOLOGY ; STRESS
资助项目National Natural Science Foundation of China[41925030] ; National Natural Science Foundation of China[42077256] ; National Natural Science Foundation of China[51809261] ; CAS Light of West China Program ; Sichuan Science and Technology Program[2020YJ0002] ; DDFORS (Dongchuan Debris Flow Observation and Research Station) of Chinese Academy of Sciences
WOS研究方向Materials Science ; Mechanics ; Physics
语种英语
出版者SPRINGER
WOS记录号WOS:000691268000003
资助机构National Natural Science Foundation of China ; CAS Light of West China Program ; Sichuan Science and Technology Program ; DDFORS (Dongchuan Debris Flow Observation and Research Station) of Chinese Academy of Sciences
源URL[http://ir.imde.ac.cn/handle/131551/56220]  
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, G. G. D.
作者单位1.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan
2.Chongqing Jiaotong Univ, Sch River & Ocean Engn, Chongqing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
推荐引用方式
GB/T 7714		 Song, D.,Zhou, G. G. D.,Chen, Q.. Flow resistance in the transition from dense to dilute granular-fluid flows[J]. GRANULAR MATTER,2021,23(3):11.
APA Song, D.,Zhou, G. G. D.,&Chen, Q..(2021).Flow resistance in the transition from dense to dilute granular-fluid flows.GRANULAR MATTER,23(3),11.
MLA Song, D.,et al."Flow resistance in the transition from dense to dilute granular-fluid flows".GRANULAR MATTER 23.3(2021):11.

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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