2010 Fiscal Year Final Research Report
Coherent structure and the associated mass transfer in wind-driven water-waves over canopy vegetation
| Project/Area Number |
20360218
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Hydraulic engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
NEZU Iehisa Kyoto University, 大学院・工学研究科, 教授 (30109029)
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| Co-Investigator(Kenkyū-buntansha) |
SANJOU Michio 京都大学, 大学院・工学研究科, 准教授 (80362458)
GOTOH Hitoshi 京都大学, 大学院・工学研究科, 教授 (40243068)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 開水路乱流 / 風波界面現象 / 植生キャノピー流れ / 組織乱流構造 / PIV計測 / ラングミュアー循環流 / 藻波現象 / レーザー流速計 |
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| Research Abstract |
The present study is to reveal the coherent structure and the associated mass transfer in wind-driven water-waves/free-surface flows over canopy vegetation by using a combination of PIV, PTV and LIF simultaneous measurements. A large-scale secondary current, i.e., Langmuir circulation, is generated in wind-induced free-surface flows and contributes largely to mass transfer in 3D fashion. Furthermore, the present study revealed the interaction between the coherent vortex and the vegetation motion, which is called the Monami phenomenon, and also examined the mass transfer by using simultaneous measurements of velocity and dye concentration.
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