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DOI | 10.1029/2017WR021582 |
Experimental Investigation of Three-Dimensional Flow Structure and Turbulent Flow Mechanisms Around a Nonsubmerged Spur Dike With a Low Length-to-Depth Ratio | |
Jeon, Jeongsook; Lee, Ji Yong; Kang, Seokkoo | |
2018-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:5页码:3530-3556 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | Flume experiments were conducted to investigate the three-dimensional flow structure and turbulent flow mechanisms around a nonsubmerged, sidewall-attached rectangular spur dike with a low length-to-depth ratio. Velocity measurements show that the wake of the spur dike in the middepth region consists of a single, large recirculation zone, while that in the near-bed region is composed of a horizontal recirculation zone and a corner vortex with its axis perpendicular to the flume sidewalls. A horseshoe vortex system observed in front of the spur dike is found to interact with the downstream recirculation zone, which results in the increase in lateral turbulent mixing especially in near-bed regions. Another vortex, which rotates in the opposite direction to the horseshoe vortex, is found beneath the free surface in front of the spur dike, which is associated with increased free surface elevation and its fluctuation. Power spectra of the transverse velocity show evidence of a periodic behavior of the near-wake shear layer emanating from the tip of the spur dike with a Strouhal number of about 2. It is also shown that the two experiments conducted at different Reynolds and Froude numbers show very similar flow fields in spite of large differences in free surface elevations, which indicates that the effects of free surface deformation on mean velocities and Reynolds stresses are marginal. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442351300017 |
WOS关键词 | DIRECT NUMERICAL-SIMULATION ; IN-STREAM STRUCTURES ; WALL-MOUNTED CUBE ; LOCAL SCOUR ; CHANNEL FLOW ; LARGE-SCALE ; COHERENT STRUCTURES ; SUBMERGED VANES ; MIXING LAYER ; WAKE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19948 |
专题 | 资源环境科学 |
作者单位 | Hanyang Univ, Dept Civil & Environm Engn, Seoul, South Korea |
推荐引用方式 GB/T 7714 | Jeon, Jeongsook,Lee, Ji Yong,Kang, Seokkoo. Experimental Investigation of Three-Dimensional Flow Structure and Turbulent Flow Mechanisms Around a Nonsubmerged Spur Dike With a Low Length-to-Depth Ratio[J]. WATER RESOURCES RESEARCH,2018,54(5):3530-3556. |
APA | Jeon, Jeongsook,Lee, Ji Yong,&Kang, Seokkoo.(2018).Experimental Investigation of Three-Dimensional Flow Structure and Turbulent Flow Mechanisms Around a Nonsubmerged Spur Dike With a Low Length-to-Depth Ratio.WATER RESOURCES RESEARCH,54(5),3530-3556. |
MLA | Jeon, Jeongsook,et al."Experimental Investigation of Three-Dimensional Flow Structure and Turbulent Flow Mechanisms Around a Nonsubmerged Spur Dike With a Low Length-to-Depth Ratio".WATER RESOURCES RESEARCH 54.5(2018):3530-3556. |
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