著者
中根 一朗
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:18848346)
巻号頁・発行日
vol.78, no.790, pp.1220-1234, 2012 (Released:2012-06-25)
参考文献数
24
被引用文献数
1 1

Japanese cedar (Cryptomeria japonica) pollinosis is the most common allergic diseases in Japan, and some researchers show about 26.5% of population being affected. Japanese cedar pollen is carried by the wind, but the pollen suspension transport behavior must be different from the wind (carrier air flow) behavior because the aerodynamic diameter of this pollen is relatively large. I estimate the mean aerodynamic diameter of Japanese cedar pollen as about 35μm in this study. The pollen falls when the wind is weak, and it is blown up and carried (saltation and resuspension) by the strong wind. If the pollen flow behavior was completely corresponding to the wind, the range of Japanese cedar growth would be very broad and the peculiar distribution of Japanese cedar might be confused. This study aims to clarify the cedar pollen suspension transport behavior and saltation transport mechanism, and to confirm the prediction method of this behavior and mechanism. Accordingly, the followings were done : (1) The aerodynamic diameter of Japanese cedar pollen was measured and the test particle was selected. (2) The suspension and saltation behavior of the test particle was observed and measured by the optical measurement methods. (3) The suspension and saltation behavior was also numerically calculated. These measured and calculated results are shown and evaluated by each other result in this paper. The knowledge about the relation between air and particle velocities is acquired. The saltation mechanism is cleared. The suspension and saltation transport behavior can be predicted by this study method.

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@dirackuma https://t.co/JVlBSFSxzE
ここに書いたようなことは、以下の花粉の日本語論文にも書いてある。 エアロゾル学会の公開記事だけを見て「分かったつもり」になるのは危険: スギ花粉の浮遊飛散挙動と落下後の跳躍挙動に関して 中根 一朗 https://t.co/U1klGfbf7c
https://t.co/lWTAvapIxx 杉花粉の実粒径は30umくらいで、終端速度で測定した空気力学径は35um程度。 予想通り、微細構造はほぼ関係ない。
スギ花粉の粒子密度は0.86g/cm3だそうだ。思ったより重かった。https://t.co/zWsvcfZYE7

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