Study on Accuracy of CFD Simulations of Wind Environment around High-Rise Buildings: A Comparative Study of k-ε Turbulence Models Based on Polyhedral Meshes and Wind Tunnel Experiments

It is important to create a comfortable wind environment around high-rise buildings for outdoor activities. To predict the environment, Computational Fluid Dynamics (CFD) has been widely used by designers and engineers. However, simulation results of different CFD turbulence models might significantly vary. This paper researched typical building verified accuracy simulations based on polyhedral meshes. The differences between k-ε those tunnel experiments were compared from perspectives speed energy. show that modified could still not perfectly match experiment results. Specifically, in low-wind-speed areas, Realizable Two-Layer K-Epsilon (RTLKE) model closest experimental tunnels, while high-wind-speed areas Standard (STLKE) tunnels. Therefore, it recommended these two are applied under conditions—the RTLKE should be simulate low-wind (e.g., defining size static-wind area buildings, predicting diffusion time pollutants etc.); STLKE high during typhoon, maximum etc.). expected findings this research study supplement some existing design guidance.