| Project/Area Number |
24540472
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kobe University |
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Principal Investigator |
IWAYAMA Takahiro 神戸大学, 理学(系)研究科(研究院), 准教授 (10284598)
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| Co-Investigator(Renkei-kenkyūsha) |
WATANABE Takeshi 名古屋工業大学, 大学院工学研究科, 准教授 (30345946)
YAMASAKI Kazuhito 神戸大学, 大学院理学研究科, 講師 (20335417)
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| Research Collaborator |
SUEYOSHI Masakazu
MURAKAMI Shinya 神戸大学, 大学院理学研究科, 研究員
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 一般化された2次元流体 / 2次元乱流 / 平行流の線形安定性 / ケルビン・ヘルムホルツ不安定 / 赤外領域スペクトル / 渦粘性 / 渦減衰準正規マルコフ化完結近似 / 平行流の安定性 / 渦列の安定性 / Kelvin-Helmholtz不安定 |
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| Outline of Final Research Achievements |
Linear stability of parallel shear flows and turbulent properties of a generalized two-dimensional fluid system were investigated theoretically and numerically. We derived a sufficient condition for stability of parallel shear flows and solved the so-called Kelvin-Helmholtz instability problem. Furthermore, using an asymptotic analysis of Eddy Damped Quasi-Normal Markovianized equation for a generalized two-dimensional fluid system, we predicted the existence of a universal spectrum in the infrared range and the anomalous form of the eddy viscosity. Those results were verified by direct numerical simulations of the governing equation for a generalized two-dimensional fluid system.
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