Structure of multiscale/fractal generated turbulence and its application to innovative engineering devices
| Project/Area Number |
25289030
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
Nagata Koji 名古屋大学, 工学(系)研究科(研究院), 教授 (50274501)
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| Co-Investigator(Kenkyū-buntansha) |
鈴木 博貴 山口大学, 理工学研究科, 助教 (10626873)
酒井 康彦 名古屋大学, 工学(系)研究科(研究院), 教授 (20162274)
寺島 修 名古屋大学, 工学(系)研究科(研究院), 助教 (50570751)
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| Co-Investigator(Renkei-kenkyūsha) |
TANNO Kenji 一般財団法人電力中央研究所, 研究員 (60462884)
ITO Yasumasa 名古屋大学, 大学院工学研究科, 准教授 (40346078)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
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| Keywords | 流体工学 / 乱流 / スカラー / 混合 / ミキサー |
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| Outline of Final Research Achievements |
Development and decay of multiscale/fractal generated turbulence are investigated in detail by means of wind tunnel/water channel experiments and numerical simulations (direct numerical simulation (DNS) and large-eddy simulation (LES)). In addition, experimental apparatus for investigating co-axial jet and swirling flow is designed and manufactured and its turbulence characteristics are measured. The experimental results show that the combination of large square grid and inhomogeneously arranged smaller grids produces an elongated non-equilibrium region. The DNS is conducted for the turbulence generated by the single-square-grid. The invariants of the velocity gradient tensor and enstrophy production and dissipation are analyzed in detail and the development of grid turbulence are clarified.
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Report
(5 results)
Research Products
(72 results)
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[Presentation] Mixing in a Turbulent Multiscale Flow2016
Author(s)
P. Baj, Y. Ito, K. Nagata, Y. Sakai, P. J. K. Bruce, O. R. H. Buxton
Organizer
24th International Congress of Theoretical and Applied Mechanics
Place of Presentation
Montreal, Canada
Year and Date
2016-08-21
Related Report
Int'l Joint Research
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[Presentation] On Non-Equilibrium Region in Grid Turbulence2014
Author(s)
K. Nagata, T. Saiki, Y. Sakai and Y. Ito
Organizer
One-Day Workshop: Turbulence Out of Classical Equilibrium in Nature and Engineering and Multiscale- Generated Flows
Place of Presentation
University Centre of Bertinoro, Italy
Year and Date
2014-09-21
Related Report
Invited
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[Presentation] Direct and Large Eddy Simulations of Grid Turbulence2014
Author(s)
K. Nagata, Y. Zhou, T. Watanabe, Y. Sakai and Y. Ito
Organizer
JSPS Supported Meeting on Interscale Transfers and Flow Topology in Equilibrium and Nonequilibrium Turbulence
Place of Presentation
The University of Sheffield, UK
Year and Date
2014-09-15 – 2014-09-16
Related Report
Invited
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[Presentation] Scalar Mixing near Turbulence-Generating Grids2014
Author(s)
T. Watanabe, Y. Ito, K. Nagata and Y. Sakai, Scalar Mixing near Turbulence-Generating Grids
Organizer
16th International Symposium on Flow Visualization
Place of Presentation
Okinawa Convention Center, Okinawa, Japan
Year and Date
2014-06-24 – 2014-06-27
Related Report
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