Mean Velocity Estimation of Viscous Debris Flows | |
Yang, Hongjuan1,2; Wei, Fangqiang2; Hu, Kaiheng2 | |
Corresponding Author | Fangqiang Wei |
2014 | |
Source Publication | JOURNAL OF EARTH SCIENCE |
ISSN | 1674-487X |
EISSN | 1867-111X |
Volume | 25Issue:4Pages:771-778 |
Subtype | Article |
Abstract | The mean velocity estimation of debris flows, especially viscous debris flows, is an important part in the debris flow dynamics research and in the design of control structures. In this study, theoretical equations for computing debris flow velocity with the one-phase flow assumption were reviewed and used to analyze field data of viscous debris flows. Results show that the viscous debris flow is difficult to be classified as a Newtonian laminar flow, a Newtonian turbulent flow, a Bingham fluid, or a dilatant fluid in the strict sense. However, we can establish empirical formulas to compute its mean velocity following equations for Newtonian turbulent flows, because most viscous debris flows are turbulent. Factors that potentially influence debris flow velocity were chosen according to two-phase flow theories. Through correlation analysis and data fitting, two empirical formulas were proposed. In the first one, velocity is expressed as a function of clay content, flow depth and channel slope. In the second one, a coefficient representing the grain size nonuniformity is used instead of clay content. Both formulas can give reasonable estimate of the mean velocity of the viscous debris flow. |
Keyword | Debris Flow Velocity One-phase Flow Two-phase Flow Viscous |
WOS Headings | Science & Technology ; Physical Sciences |
DOI | 10.1007/s12583-014-0465-z |
URL | 查看原文 |
WOS Subject Extended | Geology |
Indexed By | SCI |
WOS Keyword | AVALANCHES ; CHANNEL |
Language | 英语 |
Quartile | 4区 |
TOP | 否 |
WOS Subject | Geosciences, Multidisciplinary |
WOS ID | WOS:000339462600018 |
Funding Organization | National Natural Science Foundation of China(41201011) ; Chinese Academy of Sciences (CAS)(KZZD-EW-05-01) ; Institute of Mountain Hazards and Environment, CAS(SDSQB-2013-01) |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.imde.ac.cn/handle/131551/7550 |
Collection | 山地灾害与地表过程重点实验室 |
Affiliation | 1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
Recommended Citation GB/T 7714 | Yang, Hongjuan,Wei, Fangqiang,Hu, Kaiheng. Mean Velocity Estimation of Viscous Debris Flows[J]. JOURNAL OF EARTH SCIENCE,2014,25(4):771-778. |
APA | Yang, Hongjuan,Wei, Fangqiang,&Hu, Kaiheng.(2014).Mean Velocity Estimation of Viscous Debris Flows.JOURNAL OF EARTH SCIENCE,25(4),771-778. |
MLA | Yang, Hongjuan,et al."Mean Velocity Estimation of Viscous Debris Flows".JOURNAL OF EARTH SCIENCE 25.4(2014):771-778. |
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Mean velocity estima（466KB） | 开放获取 | CC BY-NC-SA | View Application Full Text |
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