Coupled Model of Two-phase Debris Flow, Sediment Transport and Morphological Evolution

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Coupled Model of Two-phase Debris Flow, Sediment Transport and Morphological Evolution
	He Siming1,2,3 ; Ouyang Chaojun1,2 ; Liu Wei1,2 ; Wang Dongpo4
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2016-12-01
卷号	90 期号:6 页码:2206-2215
关键词	debris flows two-phase model sediment transport entrainment rate finite volume method
ISSN号	1000-9515
通讯作者	OUYANG Chaojun
英文摘要	The volume fraction of the solid and liquid phase of debris flows, which evolves simultaneously across terrains, largely determines the dynamic property of debris flows. The entrainment process significantly influences the amplitude of the volume fraction. In this paper, we present a depth-averaged two-phase debris-flow model describing the simultaneous evolution of the phase velocity and depth, the solid and fluid volume fractions and the bed morphological evolution. The model employs the Mohr-Coulomb plasticity for the solid stress, and the fluid stress is modeled as a Newtonian viscous stress. The interfacial momentum transfer includes viscous drag and buoyancy. A new extended entrainment rate formula that satisfies the boundary momentum jump condition (Iverson and Ouyang, 2015) is presented. In this formula, the basal traction stress is a function of the solid volume fraction and can take advantage of both the Coulomb and velocity-dependent friction models. A finite volume method using Roe's Riemann approximation is suggested to solve the equations. Three computational cases are conducted and compared with experiments or previous results. The results show that the current computational model and framework are robust and suitable for capturing the characteristics of debris flows.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geosciences, Multidisciplinary
研究领域[WOS]	Geology
关键词[WOS]	SHALLOW-WATER EQUATIONS ; WENCHUAN EARTHQUAKE ; BED ; ENTRAINMENT ; AVALANCHES ; SCHEME ; AREAS ; CHINA ; RIVER
收录类别	SCI
语种	英语
WOS记录号	WOS:000392873500019
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17869]
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
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, IMHE, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China
推荐引用方式 GB/T 7714	He Siming,Ouyang Chaojun,Liu Wei,et al. Coupled Model of Two-phase Debris Flow, Sediment Transport and Morphological Evolution[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2016,90(6):2206-2215.
APA	He Siming,Ouyang Chaojun,Liu Wei,&Wang Dongpo.(2016).Coupled Model of Two-phase Debris Flow, Sediment Transport and Morphological Evolution.ACTA GEOLOGICA SINICA-ENGLISH EDITION,90(6),2206-2215.
MLA	He Siming,et al."Coupled Model of Two-phase Debris Flow, Sediment Transport and Morphological Evolution".ACTA GEOLOGICA SINICA-ENGLISH EDITION 90.6(2016):2206-2215.