For the first time in literature, we innovatively conducted CFD simulations with periodic boundary conditions to predict coupled indoor-outdoor airflows for a full-scale 3D six-floor residential building unit in urban areas with uniformly building clusters. A few influencing parameters on building ventilation performance are comprehensively analyzed, including the impacts of the surrounding buildings, wind incident angle (), external opening designs, cross or single-sided ventilation modes, and indoor facilities. Ventilation evaluation is contingent on factors including air change rate per hour (), the corresponding of purging flow rate (), and age of air ().

中文翻译：

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利用周期性边界条件节省计算资源来评估城市地区的建筑自然通风

我们在文献中首次创新性地进行具有周期性边界条件的 CFD 模拟，以预测具有统一建筑群的城市地区全尺寸 3D 六层住宅建筑单元的室内外耦合气流。综合分析了建筑通风性能的几个影响参数，包括周围建筑的影响、风入射角()、外开口设计、交叉或单面通风方式、室内设施等。通风评价取决于每小时换气次数（）、对应的吹扫流量（）和空气寿命（）等因素。