2013 Fiscal Year Final Research Report
Investigation of coherent structure and gas transfer mechanism in Langmuir circulation using stereo PIV / LIF system
| Project/Area Number |
23560609
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 京都大学, 工学(系)研究科(研究院), 名誉教授 (30109029)
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| Co-Investigator(Kenkyū-buntansha) |
山上 路生 (80362458)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ラングミュア循環流 / 風波 / 界面ダイナミクス / ガス輸送 |
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| Research Abstract |
There remains uncertainty about significant relationship between the gas transfer and large-scale three-dimensional currents such as Langmuir circulation. Therefore, the present project studied following topics using highly accurate fluid measurements system.
1)We developed highly accurate stereoscopic PIV system and measured all three components of velocity depending on space and time. The measured data let us investigate coherent structure, Stokes drift and longitudinal vortex in detail. 2)We also measured DO in the laboratory flume, and could reveal the contributions of the circulation on divergence and convergence of momentum. Particularlly, the relation between the cell formation and gas transfer velocity was revealed reasonably.
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