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A quasi single-phase model for debris flows and its comparison with a two-phase model
Xia Chun-chen1; Li Ji1; Cao Zhi-xian1; Liu Qing-quan2; Hu Kai-heng3
2018-05-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume15Issue:5Pages:1071-1089
AbstractA depth-averaged quasi single-phase mixture model is proposed for debris flows over inclined bed slopes based on the shallow water hydrosediment-morphodynamic theory with multi grain sizes. The stresses due to fluctuations are incorporated based on analogy to turbulent flows, as estimated using the depth-averaged k - epsilon turbulence model and a modification component. A fully conservative numerical algorithm, using wellbalanced slope limited centred scheme, is deployed to solve the governing equations. The present quasi single-phase model using four closure relationships for the bed shear stresses is evaluated against USGS experimental debris flow and compared with traditional quasi single-phase models and a recent physically enhanced two-phase model. It is found that the present quasi single-phase model performs much better than the traditional models, and is attractive in terms of computational cost while the two-phase model performs even better appreciably.
KeywordDebris flows Quasi single-phase mixture model Stresses due to fluctuations Well-balanced
DOI10.1007/s11629-018-4886-5
WOS KeywordSEDIMENT-MORPHODYNAMIC EQUATIONS ; GRANULAR-LIQUID MIXTURES ; FINITE-VOLUME MODEL ; FREE-SURFACE FLOWS ; NUMERICAL-SIMULATION ; MOBILE BED ; DAM-BREAK ; FIELD OBSERVATIONS ; ALLUVIAL RIVERS ; SHALLOW FLOWS
Language英语
Funding ProjectNatural Science Foundation of China[51279144] ; Natural Science Foundation of China[11432015]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000431989800012
Funding OrganizationNatural Science Foundation of China
PublisherSCIENCE PRESS
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23000
Collection山地灾害与地表过程重点实验室
Corresponding AuthorXia Chun-chen
Affiliation1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China
2.Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Xia Chun-chen,Li Ji,Cao Zhi-xian,et al. A quasi single-phase model for debris flows and its comparison with a two-phase model[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(5):1071-1089.
APA Xia Chun-chen,Li Ji,Cao Zhi-xian,Liu Qing-quan,&Hu Kai-heng.(2018).A quasi single-phase model for debris flows and its comparison with a two-phase model.JOURNAL OF MOUNTAIN SCIENCE,15(5),1071-1089.
MLA Xia Chun-chen,et al."A quasi single-phase model for debris flows and its comparison with a two-phase model".JOURNAL OF MOUNTAIN SCIENCE 15.5(2018):1071-1089.
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