AI 中文总结
通过对巴塞罗那某城区开展大涡模拟，探究风向对真实城市区域流动与湍流统计特征的多尺度影响，采用高分辨率网格与16个风向模拟，获取城市结构的全向响应。
AI 中文摘要
真实城市冠层内的局部流型、建筑高度变异性及湍流统计特征对来流变化的响应存在差异，导致风向的影响难以系统表征。为探究这类多尺度风向影响，本文对巴塞罗那佩德拉尔韦斯大学区的大气边界层开展高分辨率大涡模拟（LES），计算网格采用四阶谱元，行人高度处分辨率低于1 m，自由度约5.0×10⁸；模拟了360°范围内均匀分布的16个风向，以捕捉城市结构对风向的全向响应。
英文摘要
Effects of wind direction in realistic urban canopies remain difficult to characterize systematically because local flow patterns, building-height variability, and turbulent statistics within a realistic urban canopy may respond differently to changes in the approaching wind. To investigate these multi-scale directional impacts, we conducted high-resolution large-eddy simulations of the atmospheric boundary layer over the Zona Universitaria Pedralbes district in Barcelona. The computational meshes employ fourth-order spectral elements, yielding pedestrian-level resolutions below 1 m and resulting in approximately 5.0e8 degrees of freedom. Sixteen wind directions uniformly distributed over 360deg are simulated to capture the full directional response of the urban fabric.
