Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model
The haze-fog particle dispersion in urban communities will cause serious health and environmental problems, which has aroused society attention. The aim of the present investigation is to reveal the underlying mechanisms of haze-fog particle dispersion via Computational Fluid Dynamics (CFD) method,...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-04-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/11/4/381 |
| _version_ | 1797570726255919104 |
|---|---|
| author | Hongbo Zhu Jie Su Xuesen Wei Zhaolong Han Dai Zhou Xun Wang Yan Bao |
| author_facet | Hongbo Zhu Jie Su Xuesen Wei Zhaolong Han Dai Zhou Xun Wang Yan Bao |
| author_sort | Hongbo Zhu |
| collection | DOAJ |
| description | The haze-fog particle dispersion in urban communities will cause serious health and environmental problems, which has aroused society attention. The aim of the present investigation is to reveal the underlying mechanisms of haze-fog particle dispersion via Computational Fluid Dynamics (CFD) method, and then to provide a groundwork for the optimal spatial arrangement of urban architecture. The Delayed Detached-eddy Simulation turbulence model (DDES) and Discrete Phase Model (DPM) are utilized to investigate the wind flow distribution and the particle dispersion around the building group. The numerical results show that the particle dispersion is dominated by the incoming wind flow, the layout of architectural space and the type and distribution of vortex. The ‘single body’ wake pattern and the vortex impingement wake pattern are identified in the wind flow field, which have different effects on the distribution of haze-fog particle. The cavity formed by the layout of the building group induces primary vortex and secondary vortex, which will make it more difficult for the particles entering the square cavity to flow out. Moreover, the concentration of the particle in the rear of the buildings is relatively low due the effect of attached vortices. |
| first_indexed | 2024-03-10T20:29:28Z |
| format | Article |
| id | doaj.art-df28356ab6744b65b2f095d6815de5bc |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T20:29:28Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-df28356ab6744b65b2f095d6815de5bc2023-11-19T21:33:52ZengMDPI AGAtmosphere2073-44332020-04-0111438110.3390/atmos11040381Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase ModelHongbo Zhu0Jie Su1Xuesen Wei2Zhaolong Han3Dai Zhou4Xun Wang5Yan Bao6School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaThe haze-fog particle dispersion in urban communities will cause serious health and environmental problems, which has aroused society attention. The aim of the present investigation is to reveal the underlying mechanisms of haze-fog particle dispersion via Computational Fluid Dynamics (CFD) method, and then to provide a groundwork for the optimal spatial arrangement of urban architecture. The Delayed Detached-eddy Simulation turbulence model (DDES) and Discrete Phase Model (DPM) are utilized to investigate the wind flow distribution and the particle dispersion around the building group. The numerical results show that the particle dispersion is dominated by the incoming wind flow, the layout of architectural space and the type and distribution of vortex. The ‘single body’ wake pattern and the vortex impingement wake pattern are identified in the wind flow field, which have different effects on the distribution of haze-fog particle. The cavity formed by the layout of the building group induces primary vortex and secondary vortex, which will make it more difficult for the particles entering the square cavity to flow out. Moreover, the concentration of the particle in the rear of the buildings is relatively low due the effect of attached vortices.https://www.mdpi.com/2073-4433/11/4/381Delayed Detached-eddy Simulationdiscrete phase modelvortex patternhaze-fog dispersion |
| spellingShingle | Hongbo Zhu Jie Su Xuesen Wei Zhaolong Han Dai Zhou Xun Wang Yan Bao Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model Atmosphere Delayed Detached-eddy Simulation discrete phase model vortex pattern haze-fog dispersion |
| title | Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model |
| title_full | Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model |
| title_fullStr | Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model |
| title_full_unstemmed | Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model |
| title_short | Numerical Simulation of Haze-Fog Particle Dispersion in the Typical Urban Community by Using Discrete Phase Model |
| title_sort | numerical simulation of haze fog particle dispersion in the typical urban community by using discrete phase model |
| topic | Delayed Detached-eddy Simulation discrete phase model vortex pattern haze-fog dispersion |
| url | https://www.mdpi.com/2073-4433/11/4/381 |
| work_keys_str_mv | AT hongbozhu numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT jiesu numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT xuesenwei numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT zhaolonghan numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT daizhou numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT xunwang numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel AT yanbao numericalsimulationofhazefogparticledispersioninthetypicalurbancommunitybyusingdiscretephasemodel |