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

Area of Science:

• Urban Planning
• Environmental Science
• Building Physics

Background:

• Pedestrian wind environment quality significantly impacts thermal comfort, health, air pollutant diffusion, and urban heat island effects.
• Urban and rural planning increasingly focuses on optimizing pedestrian wind environments.

Purpose of the Study:

• To maximize pedestrian thermal comfort on Jianlan Road commercial pedestrian street.
• To quantitatively research the pedestrian wind environment in accessible urban blocks.

Main Methods:

• Computational Fluid Dynamics (CFD) numerical simulation technology.
• Space Syntax theory for analyzing accessible urban spaces.
• Numerical simulation to analyze the influence of block spatial form on pedestrian wind environment.

Main Results:

• Block spatial form significantly influences wind environment quality at pedestrian height.
• Optimized high-accessibility spaces showed a 28% increase in the comfort zone (from 58.2% to 86%).
• Static wind rate was reduced from 41.8% to 14% in optimized areas.

Conclusions:

• Block optimization schemes can significantly improve pedestrian wind environment quality.
• Enhanced wind environment quality leads to greater thermal comfort and reduced stagnant wind.
• The study provides effective strategies for optimizing urban spatial forms for better pedestrian experiences.