Simulation of air pollution dispersion in Dhaka city street canyon
Pollutant dispersion in urban areas has been a key concern in densely populated cities because pollutants can negatively impact human health and the environment. Topography and urban obstructions, such as buildings, greatly affect the atmospheric fluid flow, leading to the dispersion process. Street...
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doaj-fdd30a1f2df84bc3aee9854eba34268d2021-07-08T13:20:00ZengAIP Publishing LLCAIP Advances2158-32262021-06-01116065022065022-1110.1063/5.0033948Simulation of air pollution dispersion in Dhaka city street canyonMost. Nasrin Akhter0Md. Eabad Ali1Mohammad Matiur Rahman2Md. Nur Hossain3Md. Mamun Molla4Department of Mathematics, Dhaka University of Engineering and Technology, Gazipur 1707, BangladeshDepartment of Mathematics, Dhaka University of Engineering and Technology, Gazipur 1707, BangladeshDepartment of Mathematics, Dhaka University of Engineering and Technology, Gazipur 1707, BangladeshDepartment of Mathematics, Dhaka University of Engineering and Technology, Gazipur 1707, BangladeshDepartment of Mathematics and Physics, North South University, Dhaka 1229, BangladeshPollutant dispersion in urban areas has been a key concern in densely populated cities because pollutants can negatively impact human health and the environment. Topography and urban obstructions, such as buildings, greatly affect the atmospheric fluid flow, leading to the dispersion process. Street canyons are usually formed in highly populous cities due to the close proximity of buildings to streets to serve commercial purposes. It can also be termed as pollutant traps that exact adverse effects on urban life. Street canyons cause changes in pollutant dispersion, particularly in the case of vehicle exhaust air pollutants, which cannot be transported by the wind owing to the presence of buildings acting as impediments regardless of the wind flow. Hence, it is imperative to completely understand the behavior of pollutants within the confined urban surroundings for further improving the urban air quality. This study explores the effects of street canyons on the busiest street of Dhaka city in Bangladesh. The Reynolds-averaged Navier–Stokes based dispersion model is used to investigate the air quality phenomenon. Building height, width, building distance, and road width have been taken into consideration in the simulation. It is expected that the findings of the current study would be helpful for urban planners and designers of Dhaka city.http://dx.doi.org/10.1063/5.0033948 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Most. Nasrin Akhter Md. Eabad Ali Mohammad Matiur Rahman Md. Nur Hossain Md. Mamun Molla |
spellingShingle |
Most. Nasrin Akhter Md. Eabad Ali Mohammad Matiur Rahman Md. Nur Hossain Md. Mamun Molla Simulation of air pollution dispersion in Dhaka city street canyon AIP Advances |
author_facet |
Most. Nasrin Akhter Md. Eabad Ali Mohammad Matiur Rahman Md. Nur Hossain Md. Mamun Molla |
author_sort |
Most. Nasrin Akhter |
title |
Simulation of air pollution dispersion in Dhaka city street canyon |
title_short |
Simulation of air pollution dispersion in Dhaka city street canyon |
title_full |
Simulation of air pollution dispersion in Dhaka city street canyon |
title_fullStr |
Simulation of air pollution dispersion in Dhaka city street canyon |
title_full_unstemmed |
Simulation of air pollution dispersion in Dhaka city street canyon |
title_sort |
simulation of air pollution dispersion in dhaka city street canyon |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2021-06-01 |
description |
Pollutant dispersion in urban areas has been a key concern in densely populated cities because pollutants can negatively impact human health and the environment. Topography and urban obstructions, such as buildings, greatly affect the atmospheric fluid flow, leading to the dispersion process. Street canyons are usually formed in highly populous cities due to the close proximity of buildings to streets to serve commercial purposes. It can also be termed as pollutant traps that exact adverse effects on urban life. Street canyons cause changes in pollutant dispersion, particularly in the case of vehicle exhaust air pollutants, which cannot be transported by the wind owing to the presence of buildings acting as impediments regardless of the wind flow. Hence, it is imperative to completely understand the behavior of pollutants within the confined urban surroundings for further improving the urban air quality. This study explores the effects of street canyons on the busiest street of Dhaka city in Bangladesh. The Reynolds-averaged Navier–Stokes based dispersion model is used to investigate the air quality phenomenon. Building height, width, building distance, and road width have been taken into consideration in the simulation. It is expected that the findings of the current study would be helpful for urban planners and designers of Dhaka city. |
url |
http://dx.doi.org/10.1063/5.0033948 |
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