2012 Fiscal Year Final Research Report
Multiple diffusion of active scalars in stratified turbulence
| Project/Area Number |
22360078
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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 |
Fluid engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Research Collaborator |
MIYAZAKI Takeshi 電気通信大学, 電気通信学研究科, 教授 (50142097)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 成層乱流 / レーザー誘起蛍光法 / 粒子画像計測法 |
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| Research Abstract |
Turbulent diffusion in stratified turbulence with two different molecular diffusion coefficients has been investigated by water tank experiments, numerical simulations and the rapid distortion theory. In water tank experiments, the method of reflective index matching is established, and a new shape of turbulence grid has been developed to measure the statistics of turbulence for a several times longer period than the previous studies.Then, the periodic exchange of kinetic and potential energy and the oscillation of vertical density flux could be clearly observed.
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