CFD modelling of ultrafine particle number concentration and dispersion at a bus station

Wang, Lina, Morawska, Lidia, & Jayaratne, Rohan (2008) CFD modelling of ultrafine particle number concentration and dispersion at a bus station. In 11th International Conference on Indoor Air Quality and Climate, 17th August to 22nd August 2008, Copenhagen, Denmark.


Due to the potential effects of vehicle emissions on human health, the ability to predict ultrafine particle number concentration and dispersion is important for maintaining a healthy environment and evaluating human exposure. This study aimed to investigate the concentration and distribution of airborne particles at a bus station, with the buses idling. The results of the CFD modeling used in this study indicated that wind direction, wind speed and the ultrafine particle emission factors of buses all play a critical role in determining pollutant concentration and distribution. Airborne particles were found to increase down wind from the bus station and decrease with increasing distance from the bus station. This study also compared the results of the CFD model with experimental measurements and confirmed that CFD modeling is a fast, simple and effective method for predicting ultrafine particle number concentration and dispersion produced by idling buses. Further studies should aim at developing predictive models for ultrafine particle number concentration when the buses are in motion, in order to determine the relative importance of acceleration and deceleration in contributing to pollutant dispersion.

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ID Code: 15419
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Ultrafine particle, Particle number concentration, Bus station, Computational fluid dynamics, Emission factor
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Turbulent Flows (091508)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2008 (please consult author)
Deposited On: 31 Oct 2008 00:00
Last Modified: 29 Feb 2012 13:52

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