Numerical study of leaked natural gas dispersion within an urban street canyon considering the distribution of ground surface flux

2016 ◽  
pp. 61-64
Author(s):  
Yan Wang ◽  
Hong Huang ◽  
Li-Da Huang
Keyword(s):  
Natural Gas ◽  
Street Canyon ◽  
Numerical Study ◽  
Ground Surface ◽  
Surface Flux ◽  
Urban Street Canyon ◽  
Gas Dispersion ◽  
Urban Street

A Numerical Study on Airflow and Particle Dispersion within an Urban Street Canyon with Different Wedge-Shaped Roofs

2013 ◽  
Vol 869-870 ◽  
pp. 213-217
Author(s):  
Yakup Parida ◽  
Wen Rong He ◽  
Zhong Hua Zhou ◽  
Deng Feng Fu
Keyword(s):  
Street Canyon ◽  
Stokes Equations ◽  
Numerical Study ◽  
Distribution Patterns ◽  
Particle Dispersion ◽  
Atmospheric Environment ◽  
Navier Stokes ◽  
Urban Street Canyon ◽  
Urban Street ◽  
Pollution Levels

This work presents a numerical study on airflow and particle dispersion within an urban street canyon with different wedge-shaped roof. A two-dimensional computational fluid dynamics (CFD) model for evaluating the airflow and particles dispersion within a street canyon was built up, which was based on the incompressible Reynolds Averaged Navier-Stokes equations, turbulence model and the particles transportation equation. It is revealed that: (1) particles dispersion inside an urban street canyon is mostly dominated by the in-canyon wind flow; (2) different wedge-shaped roof configurations causes a variety of particles distribution patterns; (3) air pollution levels are much higher in the step-down canyons relative to the step-up canyons; (4) the simulated result of FLUENT is reasonable, and the prospect of applying FLUENT to study atmospheric environment is very well. Key words: CFD; street canyon; particle dispersion; numerical simulation

Sign in / Sign up

Export Citation Format

Share Document