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Study on two-phase dynamic behaviours within non-homogeneous debris flow
Anping Shu1; Le Wang2; Songdong Shao2,3; Guoqiang Ou4
2018
Source PublicationPROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT
ISSN1741-7589
Volume171Issue:6Pages:283-298
SubtypeArticle
Contribution Rank4
AbstractNon-homogeneous debris flows consisting of a wide range of grain size are commonly modelled as two-phase flows. In adopting such an approach, a critical grain diameter to separate the solid and liquid phases within such debris flows can be determined through the principles of minimum energy dissipation. In this paper, an improved analytical approach using the resistance formula of water flow and the mass conservation law is presented to determine the velocity of solid and liquid phases within a non-homogeneous debris flow. Some of the dynamic parameters are validated against experimental data measured from the Jiangjia gully. The results show that, for the majority of non-homogeneous debris flows tested, the liquid phase exhibits higher velocity than the solid phase. However, as the bulk density of the debris flow increases, the solid phase tends to have higher velocity than the liquid phase. These findings are shown to have important implications on the vertical grading patterns of bed deposits. The field observations indicate that non-homogeneous debris flows with bulk density being significantly lower, close to and significantly higher than the critical value seem to exhibit, respectively, normal, mixed and inverse grading patterns in the alluvial fan deposits.
Keywordgeology granular materials hydraulics & hydrodynamics
DOI10.1680/jwama.16.00072
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000449290100002
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24376
Collection山地灾害与地表过程重点实验室
Corresponding AuthorLe Wang
Affiliation1.Key Laboratory of Water and Sediment Sciences of MOE, Beijing Normal University, Beijing, China;
2.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China;
3.Senior Lecturer, Department of Civil and Structural Engineering, University of Sheffield, Sheffield, UK;
4.Professor, Institute of Chengdu Mountain Hazard and Environment, Chinese Academy of Sciences, Chengdu, China
Recommended Citation
GB/T 7714
Anping Shu,Le Wang,Songdong Shao,et al. Study on two-phase dynamic behaviours within non-homogeneous debris flow[J]. PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT,2018,171(6):283-298.
APA Anping Shu,Le Wang,Songdong Shao,&Guoqiang Ou.(2018).Study on two-phase dynamic behaviours within non-homogeneous debris flow.PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT,171(6),283-298.
MLA Anping Shu,et al."Study on two-phase dynamic behaviours within non-homogeneous debris flow".PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT 171.6(2018):283-298.
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