Development of coherent structure and turbulence behind a finite-length emergent vegetation patch in open-channel flow

被引：0
|
作者：
Okamoto, T. [1 ]
Fujimoto, Y. [1 ]
Toda, K. [1 ]
Nezu, I. [1 ]
机构：
[1] Kyoto Univ, Dept Civil Engn, Kyoto 606, Japan
来源：
RIVER FLOW 2014 | 2014年
关键词：
TRANSPORT;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In the present study, we examined the development of coherent motion and the wake structure behind the finite-length vegetation patch. The vegetation patch consists of an emergent rectangular array of cylinders. Three vegetation patch length (L-p) and two vegetation density (lambda) are tested. Turbulence measurements were intensively conducted in partly-vegetated open-channel flows by using PIV. The mechanisms which control the flow and turbulent development around the vegetation patch are discussed. The results indicated that an increase in the vegetation patch length causes acceleration of the turbulent development behind the patch and increases the length of wake region downstream of the patch where its effect is significant.
引用
收藏
页码：437 / 443
页数：7
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