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Computational versus Wind Tunnel Simulation of Atmospheric Boundary Layer Flow for Structural Engineering Applications

机译：结构工程应用的大气边界层流量计算与风洞模拟

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Atmospheric Boundary Layer (ABL) flow simulations have been performed using Large Eddy Simulation (LES) to assess the suitability of the simulated flow for structural wind engineering applications. The governing equations of straight ABL flow for structural engineering purposes were formulated based on state-of-the-art meteorological studies. The balance of the horizontal pressure gradient force and the ground friction was used in the Computational Fluid Dynamics (CFD) solver to achieve dynamic equilibrium throughout the ABL flow. In the simulation using the precursor method, turbulent ABL flow was developed naturally to achieve horizontally homogenous ABL flow. To reduce computational resource requirements this study employed a model scale approach, similar to the approach used in wind tunnel simulations.Based on the assessment of the simulated results via comparisons with measurements reported in the literature and values recommended in the ASCE 49-12 Standard for wind tunnel testing, the quality of the simulations for structural engineering applications was found to be comparable with the quality of their wind tunnel counterparts. The results also identified issues, mainly due to grid resolution and inaccurate SGS modeling, that need to be addressed by future research.
机译：大气边界层（ABL）流动模拟已经使用大涡模拟（LES），以评估结构风工程应用的模拟流动的适用性进行。基于国家的最先进的气象研究直ABL流的结构工程目的的控制方程进行了制定。水平气压梯度力和接地摩擦的平衡是在计算流体动力学（CFD）使用解算器来实现整个ABL流动态平衡。在使用该前体的方法的模拟，湍流ABL流量自然形成的，以实现均匀的水平ABL流动。为了减少计算资源要求采用模型尺度方法，类似于通过与实测值进行比较simulations.Based对模拟结果的评估风洞使用的方法这项研究的文献报道和值在ASCE为49-12标准推荐风洞试验，模拟结构工程应用的质量被认为是与他们的风洞同行的质量相媲美。研究结果还发现的问题，主要是由于电网的分辨率和不准确的SGS模型，需要由未来的研究加以解决。

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