| Project/Area Number |
21560165
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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 |
Fluid engineering
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
MAEKAWA Hiroshi 電気通信大学, 大学院・情報理工学研究科, 教授 (90145459)
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| Co-Investigator(Kenkyū-buntansha) |
DEGAWA Tomohiro 沼津工業高等専門学校, 講師 (80402551)
WATANABE Daisuke 富山大学, 大学院・理工学研究部(工学), 講師 (70363033)
OGATA Youichi 広島大学, 大学院・工学研究科・機械システム工学専攻, 准教授 (10323792)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 乱流 / DNS / 境界層 / 超音速流 / ダイナミクス / 巨大化 / ヘアピン渦 / 混合層 |
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| Research Abstract |
The study of turbulence developing close to solid walls, usually referred to as wall turbulence is one of the most important aspects of turbulence. In this study, large-scale dynamics in the turbulent wall shear flows are investigated, where the vortex motion such as the hairpin packet formation organization and ramifications of the organization of coherent structure is essential. Using spatially evolving direct numerical simulations, the large-scale dynamics of wall turbulence emanation is studied. The dynamics attributes to the new and even older hierarchy unstable structures generated by the lifted-up low-speed streaks.
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