Computational modeling of the atmospheric boundary layer using various two-equation turbulence models
Computational modeling of the atmospheric boundary layer using various two-equation turbulence models
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DOI：
10.12989/was.2014.19.6.687
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发表时间：
2014
影响因子：
1.6
通讯作者：
F. Juretic;H. Kozmar
中科院分区：
文献类型：
--
作者：
F. Juretic;H. Kozmar
在对各种地形类型上方发展的中性分层大气边界层的计算模拟中，研究了 k- 和 k- 二方程湍流模型的性能。这是通过使用一种模拟边界层风洞实验装置的方法来实现的，并解释了在大气中观察到的湍流参数随高度的减小。这种方法的一个重要特征是沿计算域的压力调节，此外还受到所有高度上几乎恒定的湍流动能与雷诺剪应力比的支持。除了先前相关研究中通常模拟的平均速度和湍流动能之外，该方法还侧重于雷诺剪应力的适当预测。计算结果与实验结果非常吻合。特别是，在计算域的大部分部分，计算和测量的平均速度、湍流动能和雷诺剪应力分布之间的差异小于±10%。
The performance of the k- and k- two-equation turbulence models was investigated in computational simulations of the neutrally stratified atmospheric boundary layer developing above various terrain types. This was achieved by using a proposed methodology that mimics the experimental setup in the boundary layer wind tunnel and accounts for a decrease in turbulence parameters with height, as observed in the atmosphere. An important feature of this approach is pressure regulation along the computational domain that is additionally supported by the nearly constant turbulent kinetic energy to Reynolds shear stress ratio at all heights. In addition to the mean velocity and turbulent kinetic energy commonly simulated in previous relevant studies, this approach focuses on the appropriate prediction of Reynolds shear stress as well. The computational results agree very well with experimental results. In particular, the difference between the calculated and measured mean velocity, turbulent kinetic energy and Reynolds shear stress profiles is less than ±10% in most parts of the computational domain.