Wind Tunnel Experiments on Mass Diffusion in a Street Canyon in Large-Scale Turbulent Flows
| Project/Area Number |
25420117
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
Sekishita Nobumasa 豊橋技術科学大学, 工学(系)研究科(研究院), 准教授 (70283489)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 乱流 / せん断流 / 境界層 / 渦 / 流れの制御 / 風環境 / 風洞実験 / 流れの計測 |
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| Outline of Final Research Achievements |
The present research aims to investing flow structures, the cooling effects of street surface and mass diffusion in a street canyon which is phenomena of air pollution, heat and mass transfer over a street located between buildings. An atmospheric wind tunnel with an active turbulence generator was used for it. (1) For higher turbulence Reynolds number, street surface temperature more drops and atmospheric pollutants more diffuse by turbulent motions. (2) In the case of the building height which is shorter than the street width, cross flows with turbulent motions strongly effect on mass diffusion in the street canyon. (3) In the case of the building height which is almost same as the street width, air pollutants with high density stagnate by circulation flow in the street canyon.
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Report
(4 results)
Research Products
(7 results)
