The mechanism of energy loss and transition in a flow with submerged vegetation

doi:10.1016/j.advwatres.2010.03.006

IMECH-IR > 环境力学重点实验室(2009-2011)

	The mechanism of energy loss and transition in a flow with submerged vegetation
	Huai WX; Han J; Geng C; Zhou JF(周济福); Zeng YH; Zhou JF
发表期刊	Advances in Water Resources
	2010
卷号	33 期号:6 页码:635-639
ISSN	0309-1708
摘要	The mechanism of energy balance in an open-channel flow with submerged vegetation was investigated. The energy borrowed from the local flow, energy spending caused by vegetation drag and flow resistance, and energy transition along the water depth were calculated on the basis of the computational results of velocity and Reynolds stress. Further analysis showed that the energy spending in a cross-section was a maximum around the top of the vegetation, and its value decreased progressively until reaching zero at the flume bed or water surface. The energy borrowed from the local flow in the vegetated region could not provide for spending; therefore, surplus borrowed energy in the non-vegetated region was transmitted to the vegetated region. In addition, the total energy transition in the cross-section was zero; therefore, the total energy borrowed from the flow balanced the energy loss in the whole cross-section. At the same time, we found that there were three effects of vegetation on the flow: turbulence restriction due to vegetation, turbulence source due to vegetation and energy transference due to vegetation, where the second effect was the strongest one. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
DOI	10.1016/j.advwatres.2010.03.006
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000278972700003
关键词[WOS]	VERTICAL VELOCITY DISTRIBUTION ; OPEN-CHANNEL FLOW ; FLEXIBLE VEGETATION ; MODEL ; RESISTANCE ; STREAMS
WOS研究方向	Water Resources
WOS类目	Water Resources
项目资助者	Natural Science Foundation of China [50679061, 50709025]
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/43583
专题	环境力学重点实验室(2009-2011)
通讯作者	Zhou JF
推荐引用方式 GB/T 7714	Huai WX,Han J,Geng C,et al. The mechanism of energy loss and transition in a flow with submerged vegetation[J]. Advances in Water Resources,2010,33,6,:635-639.
APA	Huai WX,Han J,Geng C,周济福,Zeng YH,&Zhou JF.(2010).The mechanism of energy loss and transition in a flow with submerged vegetation.Advances in Water Resources,33(6),635-639.
MLA	Huai WX,et al."The mechanism of energy loss and transition in a flow with submerged vegetation".Advances in Water Resources 33.6(2010):635-639.

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