Assessment of pollutant dispersion in deep street canyons under different source positions: Numerical simulation

Urban Climate ◽  
2021 ◽  
Vol 40 ◽  
pp. 101027
Author(s):  
Parisa Ghobadi ◽  
Nazanin Nasrollahi
Keyword(s):  
Numerical Simulation ◽  
Pollutant Dispersion ◽  
Street Canyons

scholarly journals Numerical simulation of pollutant dispersion in street canyons: Geometric and thermal effects

2014 ◽  
Vol 38 (24) ◽  
pp. 5883-5909 ◽  
Author(s):  
D.M.S. Madalozzo ◽  
A.L. Braun ◽  
A.M. Awruch ◽  
I.B. Morsch
Keyword(s):  
Numerical Simulation ◽  
Thermal Effects ◽  
Pollutant Dispersion ◽  
Street Canyons

Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons

2021 ◽  
pp. 1420326X2110051
Author(s):  
Le Wang ◽  
Wen-Xin Tian ◽  
Xiu-Yong Zhao ◽  
Chuan-Qing Huang
Keyword(s):  
Numerical Simulation ◽  
Velocity Distribution ◽  
Street Canyon ◽  
Pollutant Dispersion ◽  
Simulation Method ◽  
Tree Canopy ◽  
Pollutant Concentration ◽  
Air Velocity ◽  
Street Canyons ◽  
Leaf Distribution

The air flow and pollutant concentration fields in a street canyon affected by trees could affect the comfort and health of residents. At present, the description of the non-uniform/discontinuous distribution of leaves is difficult. In this study, the leaf distribution in the canopy was characterized by establishing non-continuous (uniform/random) algorithm based on a numerical simulation method, and the effects of canopy properties including, height, porosity and uniform/random leaf distribution, on the airflow and pollutant concentration fields in urban street canyons were investigated. The position of the tree canopy was found to directly affect the airflow field form and the air velocity distribution in the street canyon at low inflows. The average air velocity in the street canyon could be reduced significantly when the top of the tree canopy is near the top of the street canyon. The air velocity and pollutant concentration in the street canyon would vary only slightly due to the canopy porosity. Due to the increasing canopy porosity, the air velocity would increase, and the pollutant concentration would be reduced. The leaves are non-continuous and uniformly distributed at constant porosity, which does not significantly change the velocity distribution and pollutant concentration in the street canyon.

Numerical Simulation of Pollutant Dispersion in the Atmosphere

2017 ◽  
Author(s):  
Gustavo Naozuka ◽  
Neyva Romeiro ◽  
Eliandro Cirilo ◽  
Paulo Laerte NATTI ◽  
Letícia Mayumi Doy Okamoto
Keyword(s):  
Numerical Simulation ◽  
Pollutant Dispersion

scholarly journals Numerical simulation of pollutant dispersion in a test ventilated room

2020 ◽  
Vol 1683 ◽  
pp. 022075
Author(s):  
N G Ivanov ◽  
A D Podmarkova ◽  
M A Zasimova ◽  
D Markov
Keyword(s):  
Numerical Simulation ◽  
Pollutant Dispersion
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