湍流
雷诺数
边界层
机械
背景(考古学)
物理
雷诺分解
边界(拓扑)
流量(数学)
流动分离
经典力学
统计物理学
数学
地质学
数学分析
雷诺方程
古生物学
作者
Yongseok Kwon,Nicholas Hutchins,Jason Monty
摘要
In the analysis of velocity fields in turbulent boundary layers, the traditional Reynolds decomposition is universally employed to calculate the fluctuating component of streamwise velocity. Here, we demonstrate the perils of such a determination of the fluctuating velocity in the context of structural analysis of turbulence when applied in the outer region where the flow is intermittently turbulent at a given wall distance. A new decomposition is postulated that ensures non-turbulent regions in the flow do not contaminate the fluctuating velocity components in the turbulent regions. Through this new decomposition, some of the typical statistics concerning the scale and structure of turbulent boundary layers are revisited.
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