Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations
The objective of this study is to numerically study flow and traffic exhaust dispersion in urban street canyons with different configurations to find out the urban-planning strategies to ease the air pollution. The Computational Fluid Dynamics (CFD) model used in this study—Open Source Field Operati...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2014/458671 |
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| author | Yucong Miao Shuhua Liu Yijia Zheng Shu Wang Yuan Li |
| author_facet | Yucong Miao Shuhua Liu Yijia Zheng Shu Wang Yuan Li |
| author_sort | Yucong Miao |
| collection | DOAJ |
| description | The objective of this study is to numerically study flow and traffic exhaust dispersion in urban street canyons with different configurations to find out the urban-planning strategies to ease the air pollution. The Computational Fluid Dynamics (CFD) model used in this study—Open Source Field Operation and Manipulation (OpenFOAM) software package—was firstly validated against the wind-tunnel experiment data by using three different k-ε turbulence models. And then the patterns of flow and dispersion within three different kinds of street canyon configuration under the perpendicular approaching flow were numerically studied. The result showed that the width and height of building can dramatically affect the pollution level inside the street canyon. As the width or height of building increases, the pollution at the pedestrian level increases. And the asymmetric configuration (step-up or step-down street canyon) could provide better ventilation. It is recommended to design a street canyon with nonuniform configurations. And the OpenFOAM software package can be used as a reliable tool to study flows and dispersions around buildings. |
| format | Article |
| id | doaj-art-8bb0f0728139486dbe08a1825af41f06 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-8bb0f0728139486dbe08a1825af41f062025-02-03T01:02:42ZengWileyAdvances in Meteorology1687-93091687-93172014-01-01201410.1155/2014/458671458671Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon ConfigurationsYucong Miao0Shuhua Liu1Yijia Zheng2Shu Wang3Yuan Li4Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaThe objective of this study is to numerically study flow and traffic exhaust dispersion in urban street canyons with different configurations to find out the urban-planning strategies to ease the air pollution. The Computational Fluid Dynamics (CFD) model used in this study—Open Source Field Operation and Manipulation (OpenFOAM) software package—was firstly validated against the wind-tunnel experiment data by using three different k-ε turbulence models. And then the patterns of flow and dispersion within three different kinds of street canyon configuration under the perpendicular approaching flow were numerically studied. The result showed that the width and height of building can dramatically affect the pollution level inside the street canyon. As the width or height of building increases, the pollution at the pedestrian level increases. And the asymmetric configuration (step-up or step-down street canyon) could provide better ventilation. It is recommended to design a street canyon with nonuniform configurations. And the OpenFOAM software package can be used as a reliable tool to study flows and dispersions around buildings.http://dx.doi.org/10.1155/2014/458671 |
| spellingShingle | Yucong Miao Shuhua Liu Yijia Zheng Shu Wang Yuan Li Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations Advances in Meteorology |
| title | Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations |
| title_full | Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations |
| title_fullStr | Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations |
| title_full_unstemmed | Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations |
| title_short | Numerical Study of Traffic Pollutant Dispersion within Different Street Canyon Configurations |
| title_sort | numerical study of traffic pollutant dispersion within different street canyon configurations |
| url | http://dx.doi.org/10.1155/2014/458671 |
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