Abstract The Precursor Database Method can be utilised to produce turbulent inlet boundary conditions for a LES to determine the wind loads on a high-rise building. The Precursor Database Method is an embedded method within Computational Wind Engineering but is, however, often a minor subtask in a study and the quality assurance is usually not comprehensive. 4 precursor models are assessed and validated with an Experimental Wind Tunnel. By rearranging the roughness elements in the Digital Wind Tunnel, the grid size was significantly reduced, while preserving the turbulent flow. Furthermore, the wind tunnel inlet contraction was added to the CFD model and reduced a speed-up error near the sidewalls. The paper suggests guidelines for a standard CFD setup of a Precursor Database model that is viable for industrial employment. It clarifies the considerations of geometry, temporal and spatial discretisation and the utilisation. Finally, the guidelines elaborate on how to secure the transfer of the mapped flow from the precursor domain to the test section domain.

中文翻译：

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使用前体数据库方法的 CFD 流入条件的工程方法

摘要 前体数据库方法可用于为 LES 生成湍流入口边界条件，以确定高层建筑的风荷载。前体数据库方法是计算风工程中的一种嵌入方法，但通常是研究中的次要子任务，并且质量保证通常不全面。使用实验风洞评估和验证了 4 个前驱模型。通过重新排列数字风洞中的粗糙度元素，网格尺寸显着减小，同时保留了湍流。此外，风洞入口收缩被添加到 CFD 模型中，并减少了侧壁附近的加速误差。该论文为适用于工业就业的 Precursor Database 模型的标准 CFD 设置提出了指导方针。它阐明了几何、时间和空间离散化和利用的考虑。最后，指南详细说明了如何确保映射流从前体域到测试段域的传输。