Evaluation and optimization of outdoor wind environment in block based on space syntax and CFD simulation

• Published in: PloS one Vol. 19; no. 3; p. e0297683
• Main Authors: Cao, Peng, Li, Wenhui
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 28-03-2024; Public Library of Science (PLoS)
• Subjects: Air Pollutants - analysis; Cities; Computer and Information Sciences; Computer Simulation; Earth Sciences; Ecology and Environmental Sciences; Engineering and Technology; Environmental aspects; Health aspects; Hot Temperature; Influence; Pedestrians; Physical Sciences; Psychological aspects; Social Sciences; Urban ecology; Wind; China
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0297683

The wind environment quality at the height of pedestrians can significantly affect the thermal comfort and physical and mental health of pedestrians, promote the diffusion of air pollutants and inhibit the formation of urban heat island effect, and has been paid more and more attention in the field of urban and rural planning. This paper takes Jianlan Road commercial pedestrian Street as an example to maximize the thermal comfort of pedestrians. Based on CFD numerical simulation technology and space syntax theory, the pedestrian wind environment of the accessible space of the block is selected for quantitative research. Through numerical simulation, the influence of block spatial form on the wind environment at pedestrian height under the initial condition of uniform air flow is analyzed, and some suggestions are put forward for the optimization of block spatial form. Finally, the block optimization scheme is verified and simulated. The visualization results show that the wind environment quality of the optimized high-accessibility space is significantly improved, the proportion of comfort zone is increased from 58.2% to 86%, and the static wind rate is reduced from 41.8% to 14%. The wind environment optimization effect is obvious.