Numerical simulation on turbulent flow generated by roughness elements in an urban boundary layer
| Project/Area Number |
25820282
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Architectural environment/Equipment
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| Research Institution | Kyushu University |
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Principal Investigator |
IKEGAYA Naoki 九州大学, 総合理工学研究科(研究院), 助教 (70628213)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 都市キャノピー / 粗面乱流境界層 / 風環境 / 数値解析 / 輸送現象 |
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| Outline of Final Research Achievements |
In this study, there are two main themes : (1) investigation on turbulent transport mechanism of scalar and momentum, (2) development of evaluation method for wind environment in an urban area. The followings are shown. (a) Turbulent structure which causes large momentum transport are visualized based on conditional averaging method. (b) New prediction equation is proposed to express wind environment at a pedestrian level by using geometrical parameters. (c) Probability densities of wind speed at a pedestrian level shows similar function of normalized probability variables defined by the mean and the standard deviation of wind speed. (d) The strong correlation are observed between wind speed near roughness elements and those pressure.
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Report
(3 results)
Research Products
(21 results)
