| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
The structure and mechanism of large-scale turbulent motions (wind fluctuations) were investigated by numerical simulation in an idealized urban canyon. First, a numerical simulation was performed for a turbulent flow in an idealized urban canyon with the homogeneous laminar flow at the inlet boundary, and it was found that a large-scale turbulent structure was generated within the urban canopy. Second, the results of the different wind-direction fluctuations show that effects of them on large-scale turbulent structures and gas dispersion within the canopy are quite small. Large-scale turbulent structures within the canopy are mainly generated by block.
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