Study on Influence Law of Urban Architectural Structure on the Automobile Exhaust Diffusion Based on CFD

Abstract:

For study the law of urban buildings, in particular, the buildings at both roads’ sides in crossroads impacting on the diffusion of automobile exhaust, using CFD, combined with meteorological wind，simulates a crossroads automobile exhaust diffusion processing during waiting 35s. The results are following: in poor circulation areas, CO volume fraction in the buildings near-Earth space is up to 1.0e-7 and more than 100 times average value of the entire study area, so buildings structural layout has great influence. After Analysis, propose that local meteorological wind direction and speed should be considered and different height gradient design should be selected in buildings structural layout, so that the exhaust spread rapidly and drift to the urban high altitude, in order to improve air quality.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 751-755
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.751
• Online since: May 2012
• Authors: Yong Zhang, Zheng Qi Gu, Zhen Wang, Yong Yu
• Keywords: Automobile Exhaust, Computational Fluid Dynamics (CFD), Diffusion, Urban Architectural Structure

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