IMECH-IR  > 流固耦合系统力学重点实验室
A double layer-averaged model for dam-break flows over mobile bed
Li J(李季); Cao ZX(曹志先); Pender G.; Liu QQ(刘青泉); Cao, ZX (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
Source PublicationJOURNAL OF HYDRAULIC RESEARCH
2013-10-01
Volume51Issue:5Pages:518-534
ISSN0022-1686
Abstract

Dam-break flows over mobile bed are often sharply stratified, comprising a bedload sediment-laden layer and an upper clear-water layer. Double layer-averaged (DL) models are attractive for modelling such flows due to the balance between the computing cost and the ability to represent stratification. However, existing DL models are oversimplified as sediment concentration in the sediment-laden layer is presumed constant, which is not generally justified. Here a new DL model is presented, explicitly incorporating the sediment mass conservation law in lieu of the assumption of constant sediment concentration. The two hyperbolic systems of the governing equations for the two layers are solved separately and simultaneously. The new model is demonstrated to agree with the experimental measurements of instant and progressive dam-break floods better than a simplified double layer-averaged model and a single layer-averaged model. It shows promise for applications to sharply stratified sediment-laden flows over mobile bed.

KeywordDam Break Flood Layer-averaged Model Sediment-laden Flow Shallow Flow
Subject Area水动力学 ; 环境流体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000326370800004
Funding OrganizationNatural Science Foundation of China [10932012, 11172217, 51279144]; National Key Basic Research and Development (973) Program of China [2007CB714106]; UK Royal Academy of Engineering [RAEng/5502]
DepartmentLMFS水环境流体力学(LEM)
Classification二类/Q1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47546
Collection流固耦合系统力学重点实验室
Corresponding AuthorCao, ZX (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
Recommended Citation
GB/T 7714
Li J,Cao ZX,Pender G.,et al. A double layer-averaged model for dam-break flows over mobile bed[J]. JOURNAL OF HYDRAULIC RESEARCH,2013,51(5):518-534
APA Li J,Cao ZX,Pender G.,Liu QQ,&Cao, ZX .(2013).A double layer-averaged model for dam-break flows over mobile bed.JOURNAL OF HYDRAULIC RESEARCH,51(5),518-534.
MLA Li J,et al."A double layer-averaged model for dam-break flows over mobile bed".JOURNAL OF HYDRAULIC RESEARCH 51.5(2013):518-534.
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