Wind Environment Simulation Analysis of Office Buildings Based on PHOENICS—A Case Study of Mianyang City Office Complex

This electronic investigates the wind environment optimization of office build-ing clusters in hot-summer and cold-winter regions through computation-al fluid dynamics simulations under dual-season conditions. A three-dimensional nu-merical model encompassing a 1200-meter extended area was established, em-ploying high-precision meshing and advanced turbulence models to analyze wind speed distribution at pedestrian height under winter northwest prevailing winds and summer southeast wind-induced surface pres-sure gradients. Results reveal that winter leeward zones develop maximum wind speeds of 7.2 m/s, with 18.3% of the area exceeding standard limits. Summer southeast facades ex-hibit significant negative pressure coefficients of 0.82, re-ducing natural ventila-tion efficiency to 1.2 air changes per hour. Through ex-treme pressure differential analysis, primary entrances are recommended for placement in southeast re-gions with pressure gradients below 0.3 to mitigate winter wind disturbances. The optimized design enhances site thermal comfort by 38% and achieves an-nual energy savings of 12.7 kWh/m², providing quanti-tative benchmarks for green building wind environment assessment and ad-vancing climate-responsive urban design practices.