Abstract
The quality of air condition is one of the major factors affecting the health of people living in urban areas. Different geometry of street canyon coupled with different wind direction will result in various concentration of pollutant accumulated in the canyon. The purpose of this research is to study the flow structure and also pollutant dispersion in a 3-D symmetric street canyon using computational fluid dynamics. Different k-Ɛ turbulent models are used to simulate the flow structure and the result is compared to experimental. The effects of aspect ratio and Reynolds Number to the flow structure and pollutant dispersion in a street canyon are investigated. The studied canyons are avenue, regular and deep canyon with aspect ratio of 0.4, 1 and 2 respectively and Reynolds Numbers of 9000 and 30700.
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