scholarly journals On the Mechanism of Air Pollutant Removal in Two-Dimensional Idealized Street Canyons: A Large-Eddy Simulation Approach

2013 ◽  
Vol 148 (1) ◽  
pp. 241-253 ◽  
Author(s):  
Tracy N. H. Chung ◽  
Chun-Ho Liu
Keyword(s):  
Large Eddy Simulation ◽  
Air Pollutant ◽  
Pollutant Removal ◽  
Two Dimensional ◽  
Simulation Approach ◽  
Street Canyons ◽  
Eddy Simulation ◽  
Large Eddy

Large-Eddy Simulation of Reactive Pollutant Dispersion Over Street Canyons of Different Aspect Ratios

2014 ◽  
Author(s):  
T. Z. Du ◽  
Chun-Ho Liu ◽  
Y. B. Zhao
Keyword(s):  
Aspect Ratio ◽  
Large Eddy Simulation ◽  
Chemical Reactions ◽  
Pollutant Dispersion ◽  
Pollutant Removal ◽  
Street Canyons ◽  
Eddy Simulation ◽  
Aspect Ratios ◽  
Large Eddy ◽  
Reactive Pollutant

In urban areas, pollutants are emitted from vehicles then disperse from the ground level to the downstream urban canopy layer (UCL) under the effect of the prevailing wind. For a hypothetical urban area in the form of idealized street canyons, the building-height-to-street-width (aspect) ratio (AR) changes the ground roughness which in turn leads to different turbulent airflow features. Turbulence is considered an important factor for the removal of reactive pollutants by means of dispersion/dilution and chemical reactions. Three values of aspect ratio, covering most flow scenarios of urban street canyons, are employed in this study. The pollutant dispersion and reaction are calculated using large-eddy simulation (LES) with chemical reactions. Turbulence timescale and reaction timescale at every single point of the UCL domain are calculated to examine the pollutant removal. The characteristic mechanism of reactive pollutant dispersion over street canyons will be reported in the conference.

Large-Eddy Simulation for the Mechanism of Pollutant Removal from a Two-Dimensional Street Canyon

2010 ◽  
Vol 138 (2) ◽  
pp. 195-213 ◽  
Author(s):  
Takenobu Michioka ◽  
Ayumu Sato ◽  
Hiroshi Takimoto ◽  
Manabu Kanda
Keyword(s):  
Large Eddy Simulation ◽  
Street Canyon ◽  
Pollutant Removal ◽  
Two Dimensional ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals On the Development of the Large Eddy Simulation Approach for Modeling Turbulent Flow: LDRD Final Report

2002 ◽  
Author(s):  
RODNEY C SCHMIDT ◽  
THOMAS M SMITH ◽  
PAUL E DESJARDIN ◽  
THOMAS E VOTH ◽  
MARK A CHRISTON ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Final Report ◽  
Simulation Approach ◽  
Eddy Simulation ◽  
Large Eddy
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