期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 98, 期 12, 页码 903-910出版社
ELSEVIER
DOI: 10.1016/j.jweia.2010.09.004
关键词
Street canyon; Pollutant dispersion; Analytical model; Urban canopy flow
We investigate pollutant dispersion in a street canyon for an external wind direction parallel to the street axis a case which has been poorly documented in the literature The study is performed numerically and analytically by means of a model based on a series of simplifying assumptions The range of validity of these assumptions is discussed by comparing analytical and numerical results for two different street aspect ratios Our results show that for a critical length of the street ground level concentration can be higher than those observed in a street canyon whose axis is perpendicular to the external wind direction We show that this critical length depends on the street aspect ratio (C) 2010 Elsevier Ltd All rights reserved
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