Study on'exact'coherent structures in turbulent flows
| Project/Area Number |
22560065
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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 |
Engineering fundamentals
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| Research Institution | Kyoto University |
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Principal Investigator |
NAGATA Masato 京都大学, 大学院・工学研究科, 教授 (80303858)
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| Co-Investigator(Kenkyū-buntansha) |
NOGUCHI Takashi 京都大学, 大学院・工学研究科, 助教 (10447906)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ナヴィエ・ストークスの方程式 / 乱流遷移 / 流れの安定性 / 厳密秩序構造 / 平面クエット流 / 平面ポアズイユ流 / 分岐理論 / 対称性の破れ / 流れの動力学 / ホモトピー法 / 安定性理論 / 分岐解析 / ナヴィエ・ストークス方程式 / 非線形安定性解析 / クエット流 / ポアズイユ流 / コヒーレント構造 / 非線形安定性解 / ホモトピー手法 / 円管ポアズイユ流 / SSP法 |
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| Research Abstract |
Exact coherent solutions in sliding Couette flow, pipe flow and plane Poiseuille flow are obtained by a method of homotopy continuation from the exact coherent solution in plane Couette flow. It is found that a mirror-symmetric spatial structure is commonly observed in these flows and plays an important role in transition from laminar flow to turbulence.
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Report
(4 results)
Research Products
(49 results)
