教師資料查詢 | 類別: 期刊論文 | 教師: 洪勇善 Hong Yung-shan (瀏覽個人網頁)

標題:Numerical simulations and wind tunnel studies of pollutant dispersion in the urban street canyons with different height arrangements
學年101
學期2
出版(發表)日期2013/04/01
作品名稱Numerical simulations and wind tunnel studies of pollutant dispersion in the urban street canyons with different height arrangements
作品名稱(其他語言)
著者Chang, Cheng-Hsin; Lin, Jin-Shian; Cheng, Chii-Ming; Hong, Yung-Shan
單位
出版者
著錄名稱、卷期、頁數Journal of Marine Science and Technology 21(2), pp.119-126
摘要Air pollution in big city areas resulting from exhaust emissions is a major urban problem. Often traffic pollution excess controls air pollution management decisions. There are a number of elaborate predictive models of pollutant dispersion and diffusion that address the effects of variable shapes of city buildings on pollutant concentrations, but few are fully validated. This study presents ventilation behavior in different street canyon configurations. To evaluate dispersion in a model urban street canyon, a series of tests with various street canyons with different height in upwind and downwind of street canyon are presented. These buildings were arranged in 2-D configurations with different height in upwind and downwind of street canyon. The results showed that a higher concentration of pollutants accumulates under the leeward of the street canyon due to the occurrence of a clockwise vortex inside the street canyon when the street canyon aspect ratio (B/H) is 2. On the contrary, over the windward of the street canyon, a lower concentration of pollutants accumulates due to the occurrence of an anti-clockwise vortex. The flow and dispersion of gases emitted by a line source located between two buildings inside of the urban street canyons were also determined by numerical model. Calculations were compared against CFD prediction in an Environmental Wind Tunnel of Wind Engineering Center at Tamkang University.
關鍵字wind tunnel experiment;urban street canyon;numerical simulation;dispersion
語言英文
ISSN0948-4280;1437-8213
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別日本
公開徵稿
出版型式,電子版,紙本
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