IMHE OpenIR  > 山地灾害与地表过程重点实验室
Study of pore fluid effect on the mobility of granular debris flows
Language英语
Zhou GD(周公旦)
Corresponding Author周公旦
2017-06
Source PublicationPOWDERS AND GRAINS 2017,The 8th International Conference on the Micromechanics of Granular Media ; EPJ Web of Conferences 140
Pages09046
Conference Date2017-7-3
Conference PlaceMontpellier, France
Funding OrganizationUniversité de Montpellier
Abstract
Granular debris flows in nature are composed of a wide range of solids and viscous pore fluids, moving at high velocities down sloping channels. The pore fluids in a granular debris flow affect the interactions between the solid and fluid phases and thus govern the debris-flow mobility. Study of the pore fluid effect (i.e., excess pore water pressures correlated to solid structures, and the viscous shearing and dragging) is essential for understanding the high flow mobility of granular debris flows. This study critically
reviews two dimensionless numbers with clear physical meanings, then demonstrates a new application of field monitoring data for identifying natural debris flows on large scales (i.e., surge and continuous debrisflows, respectively). This study illustrates that, the pore fluid viscous shearing stress dominates solid inertial stress due to solids collision. It is also found that different to continuous debris-flows, the high pore fluid pressures generated in surge debris-flow body dissipate quite slowly and mostly influence particle contact
behaviour significantly. A new scientific criterion for identification of continuous and surge debris flow in nature can be given by this study
KeywordPore Fluid Mobility Granular Debris Flows
Subject Area自然地理学
DOI10.1051/epjconf/201714009046
Indexed ByISTP
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20766
Collection山地灾害与地表过程重点实验室
Affiliation1.周公旦
2.孙其诚
Recommended Citation
GB/T 7714
Zhou GD. Study of pore fluid effect on the mobility of granular debris flows[C],2017:09046.
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