| 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
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| 2018-05-01 | |
| Source Publication | JOURNAL OF MOUNTAIN SCIENCE
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| ISSN | 1672-6316 |
| Volume | 15Issue:5Pages:1071-1089 |
| Abstract | A 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. |
| Keyword | Debris flows Quasi single-phase mixture model Stresses due to fluctuations Well-balanced |
| DOI | 10.1007/s11629-018-4886-5 |
| WOS Keyword | SEDIMENT-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 Project | Natural Science Foundation of China[51279144] ; Natural Science Foundation of China[11432015] |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000431989800012 |
| Funding Organization | Natural Science Foundation of China |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/23000 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Xia Chun-chen |
| Affiliation | 1.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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| A quasi single-phase（1061KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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