Turbulent boundary layer generated using stochastic method for inflow conditions of LES
Turbulent boundary layer generated using stochastic method for inflow conditions of LES
复制标题
使用随机方法生成 LES 流入条件的湍流边界层
DOI：
10.1007/s12572-018-0214-0
复制
发表时间：
2018
影响因子：
0.9
通讯作者：
Kishida Takeshi
中科院分区：
文献类型：
--
作者：
Noda Hiroshi;Nakayama Akihiko;Miyashita Koichi;Kishida Takeshi
湍流边界层的生成采用随机方法，该方法需要各点的功率谱密度和交叉谱密度，以便快速获得LES的入流条件。这种方法的优点不仅是速度，而且可以利用自然风的湍流统计数据，这已经被许多研究人员观察到。Noda和Nakayama（2003）提出的改进方法也被用于再现雷诺应力，这是湍流边界层最典型的特征之一。大涡模拟是利用产生的湍流边界层作为入流入射波进行的。生成的湍流边界层与目标吻合良好。LES结果的湍流统计似乎与目标值略有偏差。
The turbulent boundary layer was generated using the stochastic method, which needs power spectral densities and cross-spectral densities at each point for obtaining the inflow conditions of LES quickly. The advantage of this method is not only speed but also can use the turbulent statistics of natural wind, which have been observed by numerous researchers. The improved method proposed by Noda and Nakayama (2003) was also applied to reproduce the Reynolds stress, which is the one of the most typical characteristics of the turbulent boundary layer. LES was conducted using the generated turbulent boundary layer as the inflow incident. The generated turbulent boundary layer was in good agreement with the target. The turbulent statistics of LES results seem to be slightly shifted from the target values.