Vortical structures and chaos, turbulence transition in two-and three-dimensional wakes containing micro-bubbles
| Project/Area Number |
20560161
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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 | Okayama University |
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Principal Investigator |
YANASE Shinichiro (YANASE Shinichirou) 岡山大学, 大学院・自然科学研究科, 教授 (20135958)
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| Project Period (FY) |
2008 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 混相流 / 後流 / マイクロバブル / 抵抗低減 / カオス / 乱流 / 遷移 / 円柱後流 / カルマン渦列 / 安定性 / ポアンカレ断面 / スペクトル法 / 円柱交流 / 抵抗削減 |
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| Research Abstract |
Vortical structures, chaos and turbulence transition in two-and three-dimensional wakes were investigated experimentally and numerically. At first we conducted a series of experiment of micro-bubble flows through circular straight and helical pipes. Apparent drug reduction and relaminarization were observed, and reduction of thermal conduction was also seen. A new spectral code was written, by using which stationary and oscillating solutions were obtained with high accuracy.
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Report
(6 results)
Research Products
(39 results)
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[Presentation] マイクロバブルの画像解析2011
Author(s)
岩崎正晃, 後藤晋, 柳瀬眞一郎
Organizer
日本機械学会中国四国支部弟49総会・講演会
Place of Presentation
岡山理科大学,岡山市
Year and Date
2011-03-05
Related Report
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[Presentation] 円柱後流の不安定周期運動2009
Author(s)
藤原裕己, 渡辺毅(広島大), 河原源太(大阪大), 百武徹, 柳瀬眞一郎
Organizer
第26回西日本乱流シンポジウム
Place of Presentation
岡山理科大学,岡山市
Year and Date
2009-08-25
Related Report
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[Presentation] study of vortex flows behind the circular cylinder2008
Author(s)
T. Watanabe, S. Yanase, G. Kawahara
Organizer
IUTAM symposium 150 Years of Vortex Dynamics, Technical University of Denmark, Copenhagen & Lyngby, Denmark, October 12-16 2008. Poster uresentation No. IV-5
Place of Presentation
Copenhagen, Denmark
Year and Date
2008-10-14
Related Report
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