The structure of turbulence in a rapid tidal flow
The structure of turbulence in a rapid tidal flow
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快速潮汐流中的湍流结构
DOI：
10.1098/rspa.2017.0295
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
R. Flay
中科院分区：
文献类型：
--
作者：
Ian Milne;Rajnish N. Sharma;R. Flay
快速潮汐流中的湍流结构是通过对英国一个地点的基本统计特性的新观察来表征的，该地点具有简单的几何形状和平稳的表面波作用。艾莱岛海峡的平均流量超过 2.5ms−1，湍流边界层占据了大部分水柱，在海底附近可识别出近似对数的平均速度剖面。湍流的各向异性比率、光谱尺度和高阶统计数据通常与实验室中二维开放通道和其他潮汐通道的报告值非常吻合，因此为通用模型的应用提供了进一步的支持。研究结果可以帮助开发快速潮汐流中的湍流数值模型，例如用于潮汐能发电的模型。
The structure of turbulence in a rapid tidal flow is characterized through new observations of fundamental statistical properties at a site in the UK which has a simple geometry and sedate surface wave action. The mean flow at the Sound of Islay exceeded 2.5 m s−1 and the turbulent boundary layer occupied the majority of the water column, with an approximately logarithmic mean velocity profile identifiable close to the seabed. The anisotropic ratios, spectral scales and higher-order statistics of the turbulence generally agree well with values reported for two-dimensional open channels in the laboratory and other tidal channels, therefore providing further support for the application of universal models. The results of the study can assist in developing numerical models of turbulence in rapid tidal flows such as those proposed for tidal energy generation.