Development and Validation of a Thermodynamic Model for Predicting Traffic-Related Pollutants Dispersion in Urban Street Canyons under Low Wind Speed Conditions

Abstract:

To study the thermal effects on pollutant dispersion in the street canyon, a thermodynamic model is developed in this paper to predict surface temperature in street canyon environment, which can offer boundary conditions for CFD model. This model considered the shielding effect of buildings on solar radiation, the multi-reflection of radiation between building surfaces and the road. Furthermore, sensible heat exchange between the canyon space and the overlaying atmosphere was also modeled based on the classical theory of dynamics of atmospheric boundary layer. The reliability of this model is validated through a field measurement. Based on the thermodynamic model, a coupled calculation method is presented to predict traffic-related pollutants dispersion in urban street canyons under low wind speed conditions.

• Periodical: Applied Mechanics and Materials (Volumes 157-158)
• Pages: 710-713
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.157-158.710
• Online since: February 2012
• Authors: Guo Hua Gao, Jing Liu, Fei Ma, Wei Dong Luo
• Keywords: Low Wind, Street Canyon, Thermodynamic Model, Traffic-Related Pollutants

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