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Large Eddy Simulations of Pollutant Dispersion in a Street Canyon

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
Volume 8, No. 1, April 2015, Pages 11-19

M. N. A. Mohd Yazid1,*
1Department of Thermo-Fluids, Faculty of Mechanical, Engineering, Universiti Technology Malaysia, 81310 Skudai, Johor Bahru, Malaysia
*Corresponding author: afiqwitri@gmail.com

KEYWORDS

Street canyon, turbulent flow, pollutant dispersion, large eddy simulation

ABSTRACT

Flow structure and pollutant dispersion in a 3D symmetric street canyon are numerically investigated using a computational fluid dynamics (CFD) model. The analyzed parameter is Reynolds number. The studied canyons is regular canyon with aspect ratio equal to one. The Reynolds number used are 9000, 14200, 19200 and 30700 where the free stream velocity are 0.68m/s, 1.07m/s, 1.45m/s and 2.32 m/s. Transport equation for CO and air is included and is assumed as non-reactive. The source of pollutant emission is assumed only from vehicular fumes situated at ground level. The best meshing size used in this simulation is 547050 which is used to run this simulation using large eddy simulation (LES). Vortex’s pattern and strength are dependent of velocity at the roof level. Analysis on the pollutant concentration shows that high Reynolds number will give the best air ventilation for street canyon subsequently decreased the pollutant concentration level.

CITE THIS ARTICLE

MLA
Mohd Yazid, M. N. A. “Large Eddy Simulations of Pollutant Dispersion in a Street Canyon.” Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 8.1 (2015): 11-19.

APA
Mohd Yazid, M. N. A. (2015). Large Eddy Simulations of Pollutant Dispersion in a Street Canyon. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 8(1), 11-19.

Chicago
Mohd Yazid, M. N. A. “Large Eddy Simulations of Pollutant Dispersion in a Street Canyon.” Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 8, no. 1 (2015): 11-19.

Harvard
Mohd Yazid, M.N.A., 2015. Large Eddy Simulations of Pollutant Dispersion in a Street Canyon. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 8(1), pp.11-19.

Vancouver
Mohd Yazid, MNA. Large Eddy Simulations of Pollutant Dispersion in a Street Canyon. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 2015;8(1):11-19.

REFERENCES

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