THE IMPACT OF WIND INERTIAL AND FIRE BUOYANCY FORCES ON AIR POLLUTION IN STREET CANYON

Dušica Pešić, Radoslav Kartov, Darko Zigar, Valentin Chochev

DOI Number
-
First page
65
Last page
74

Abstract


The air quality has become an important environmental problem worldwide. The pollutants transport in and over urban “street canyons” has attracted great attention due to their negative effects on human health and environment. The aim of this paper is to analyze the impacts of wind and fire on air pollution in a street canyon. For simulations of wind flow and fire plume flow Large Eddy Simulation method of Fire Dynamics Simulator software has been used. Numerical results show that the recirculation flow and the vortices inside the canyon are dependent on a wind inertial force and a fire buoyancy force. The fire buoyancy effect may have a significant impact on the pollutants transport in and over the canyon. For the low wind velocity cases, the dispersion of fire pollutants is controlled by its buoyancy. On the other hand, when the wind effect dominates the buoyancy effect, the pollutants are primarily driven by the wind inertial force. This complex phenomenon affects the pollutant dispersion patterns within many urban streets.

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References


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