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| Simulation of Ventilation Performance of Complex Urban Forms Coupled Based on WRF-CFD |
| Received:February 03, 2019 Revised:June 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.06.011 |
| KeyWord:WRF CFD urban ventilation performance |
| Author | Institution |
| LIU Chong |
1. a. School of Atmospheric Sciences, Nanjing University, Nanjing , China |
| PENG Yun-long |
1. b. School of Architecture and Urban Planning, Nanjing University, Nanjing , China |
| WANG Ti-jian |
1. a. School of Atmospheric Sciences, Nanjing University, Nanjing , China |
| GU Yu-sheng |
1. b. School of Architecture and Urban Planning, Nanjing University, Nanjing , China |
| ZHANG Ting-ting |
2. Binzhou Meteorological Bureau of Shandong Province, Binzhou , China |
| DING Wo-wo |
1. b. School of Architecture and Urban Planning, Nanjing University, Nanjing , China |
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| Abstract: |
| Objective To study on ventilation performance of complex urban streets in stationary weather. Methods In this paper, CFD fluid model was coupled with mesoscale meteorological model WRF. By choosing a stationary weather process in winter, the ventilation performance of different urban districts in Nanjing was compared and analyzed; the ventilation performance of different urban districts was evaluated; the existing state of urban ventilation performance was given; and rationalization suggestions for urban planning were put forward. Results Under static and stable weather conditions, the ventilation of densely populated residential areas was seriously insufficient. The wind speed of most blocks was only 0.3 m/s, which was not conducive to the healthy living of residents. The local ventilation performance was mainly determined by the location of the intersection of the street and the positional relationship between the street and the dominant wind direction. For this case, the ventilation performance of the central area of the integrated section was significantly better than that of other areas. The ventilation performance of the street or road in the windward direction was obvious, and it could reach 2-3 m/s in static weather, which played a good role of the urban ventilation corridor. Conclusion Reasonable urban design and architectural layout can effectively increase the ventilation of local areas, especially in high-density areas, which is conducive to the spread of pollutants and the health of residents. |
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