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. | |
发表期刊 | JOURNAL OF HYDRAULIC RESEARCH |
2013-10-01 | |
卷号 | 51期号:5页码:518-534 |
ISSN | 0022-1686 |
摘要 | 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. |
关键词 | Dam Break Flood Layer-averaged Model Sediment-laden Flow Shallow Flow |
学科领域 | 水动力学 ; 环境流体力学 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000326370800004 |
项目资助者 | Natural 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] |
课题组名称 | LMFS水环境流体力学(LEM) |
论文分区 | 二类/Q1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/47546 |
专题 | 流固耦合系统力学重点实验室 |
通讯作者 | Cao, ZX (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China. |
推荐引用方式 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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