Physical mechanism in appearance of rhythms and patterns in flow fields
| Project/Area Number |
21540400
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Doshisha University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 流体 / 数理物理 / 流れのパターン生成 / リズムの生成 / 流れの不安定性 / 遷移 / 解の分岐構造 / パターンの発現 / 解の分岐 / 円柱を過ぎる流れ / 急拡大管流れ / ２重拡散対流 / 乱流への遷移 / ホップ分岐 / 流れの安定性 / 振動源 |
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| Research Abstract |
In the present research project, I have clarified the mechanisms to induce instability of steady flow which yields oscillation and flow patterns in the flow field. Actually, I have investigated the underlying physics of appearance of the Karman vortex street behind a circular cylinder, the mechanism of annihilation of the Karman vortex street and its regeneration, the instability and transition of the double diffusive thermal convection in ethanol-water mixture, and the induction mechanism of the bathtub vortex. From these investigations, I obtained many fruitful results and published or submitted scientific papers to prominent journals.
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Report
(6 results)
Research Products
(74 results)
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[Presentation] 円柱後流の不安定性と遷移2011
Author(s)
武本幸生,大橋俊介,水島二郎
Organizer
第49回「乱流遷移の解明と制御」研究会
Place of Presentation
Kyoto, Japan
Year and Date
2011-09-23
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