Large eddy simulation of wake structure behind a pitching wing with different aspect ratios

2022 ◽  
Author(s):  
Vineeth V K ◽  
Devendra K. Patel
Keyword(s):  
Large Eddy Simulation ◽  
Wake Structure ◽  
Eddy Simulation ◽  
Aspect Ratios ◽  
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.

scholarly journals Flow and Pollutant Transport in Urban Street Canyons of Different Aspect Ratios with Ground Heating: Large-Eddy Simulation

2011 ◽  
Vol 142 (2) ◽  
pp. 289-304 ◽  
Author(s):  
Xian-Xiang Li ◽  
Rex E. Britter ◽  
Leslie K. Norford ◽  
Tieh-Yong Koh ◽  
Dara Entekhabi
Keyword(s):  
Large Eddy Simulation ◽  
Pollutant Transport ◽  
Street Canyons ◽  
Urban Street ◽  
Eddy Simulation ◽  
Urban Street Canyons ◽  
Aspect Ratios ◽  
Large Eddy

Study on wake structure characteristics of a slotted micro-ramp with large-eddy simulation

2017 ◽  
Vol 49 (3) ◽  
pp. 035507 ◽  
Author(s):  
Xiangrui Dong ◽  
Yaohui Chen ◽  
Gang Dong ◽  
Yixin Liu
Keyword(s):  
Large Eddy Simulation ◽  
Wake Structure ◽  
Structure Characteristics ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Large Eddy Simulation of Fire Smoke Re-circulation in Urban Street Canyons of Different Aspect Ratios

2013 ◽  
Vol 62 ◽  
pp. 1007-1014 ◽  
Author(s):  
Xiaochun Zhang ◽  
Longhua Hu ◽  
Fei Tang ◽  
Qiang Wang
Keyword(s):  
Large Eddy Simulation ◽  
Street Canyons ◽  
Urban Street ◽  
Eddy Simulation ◽  
Urban Street Canyons ◽  
Aspect Ratios ◽  
Large Eddy ◽  
Fire Smoke
Sign in / Sign up

Export Citation Format

Share Document