A Field Study on Diffusion Around a Model Cube In a Suburban Canopy
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概要
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A field study on the diffusion around a cube was conducted in the urban canopy in Sep. and Nov., 1992 in Sapporo, Japan. It was found that in the urban canopy turbulence intensities were very strong, and the concentration patterns on the rooftop of the cube and on the ground level differed from those obtained from wind tunnel studies with low turbulence intensities. The relationship between the velocity fluctuations and the concentration variations was also investigated using two ultrasonic anemometers and fast-response concentration detectors. The results show that the reverse flow on the roof was caused by the ejection motions, which exist in the upwind velocity field, and also that the tracer gas released from the center of the cube roof was transported upwind by this reverse flow on the roof.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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