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Study on the Solids Contact Shearing and Collisions in Granular Debris Flows
Zhou GD(周公旦); Sun QC(孙其诚); Fei ML(费明龙)
Corresponding Author周公旦
2013-07-01
Source PublicationAIP Conference Proceedings
Volume1542Issue:1Pages:654-657
Abstract
Granular debris flows in nature are generally composed of a wide range of solid particles and viscous pore fluids, moving at high traveling velocities down sloping channels. Multiple parameters govern a granular debris flow's rheological properties and affect the interactions between the solid and fluid phases of these flows. Study of the solids contact behavior (i.e., contact shearing and collisions) is essential for understanding the high flow mobility of catastrophic geophysical granular flows/avalanches. This study critically reviews two dimensionless numbers with clear physical meanings (e.g., the Savage number and the friction number), then demonstrates a new application of field monitoring data of natural debris flows to obtain specific values of these numbers for classifying flowing regimes of granular debris flows on large scales. These numbers are then used to analyze and illustrate the contact behavior of solid particles in different flow regimes. This study shows that the flow regimes of granular debris flows are governed by the relative dominance of contact shearing and collisions between solid particles, as well as being significantly affected by the flow's pore fluid viscosity.
KeywordGranular Debris Flow Field Study Solids Contact Behavior Pore Fluid Pressure Flow Regime
Subject Area自然地理学
DOI10.1063/1.4812016
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6542
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
Zhou GD,Sun QC,Fei ML. Study on the Solids Contact Shearing and Collisions in Granular Debris Flows[J]. AIP Conference Proceedings,2013,1542(1):654-657.
APA Zhou GD,Sun QC,&Fei ML.(2013).Study on the Solids Contact Shearing and Collisions in Granular Debris Flows.AIP Conference Proceedings,1542(1),654-657.
MLA Zhou GD,et al."Study on the Solids Contact Shearing and Collisions in Granular Debris Flows".AIP Conference Proceedings 1542.1(2013):654-657.
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