2013 Fiscal Year Final Research Report
Research on the influence of urban environment to the Japanese cedar pollen resuspension and exposure phenomena
| Project/Area Number |
24651030
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental impact assessment/Environmental policy
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| Research Institution | Kanagawa Institute of Technology |
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Principal Investigator |
NAKANE Ichiro 神奈川工科大学, 工学部, 准教授 (30221451)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 花粉症 / 空中花粉 / 花粉の再浮遊 / 花粉曝露 / 都市キャノピー層 / 大気流動 / 固気二相流 / 数値シミュレーション |
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| Research Abstract |
We discussed about the suspension behavior of the Japanese cedar pollen in the urban canopy layer and the numerical prediction method of this behavior.
Much pollen flies around the outer edge of the urban canopy layer, but less pollen flies into this layer because the high buildings block the wind and the flying pollen. The pollen which flies into the urban canopy layer, is re-suspended on the bottom of this layer.
The pollen suspension behavior without re-suspension is predicted with a combination of Euler-Euler method and 1 way coupling, but the resuspension of the pollen particles can not be predicted without the collision between particles or between particles and objects. Orthogonal body-fitted curvilinear coordinate system is proposed to improve the calculation accuracy.
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