A new way to describe the transition characteristics of a rotating-disk boundary-layer flow
A new way to describe the transition characteristics of a rotating-disk boundary-layer flow
复制标题
描述旋转盘边界层流转捩特性的新方法
DOI：
10.1063/1.3696020
复制
发表时间：
2012
影响因子：
4.6
通讯作者：
R. Lingwood
中科院分区：
文献类型：
--
作者：
Shintaro Imayama;P. Alfredsson;R. Lingwood
本文提出了一种新的图解法来表示圆盘绕流的转捩阶段。用脉动方位扰动速度的概率密度函数等值线图来表示旋转圆盘边界层流动随雷诺数的变化特征。与扰动幅度（rms）或频谱分布的变化相比，该图更清楚地显示了通过层流，过渡区和湍流区的流动特性的变化。这种方法不仅对圆盘流，而且对其它流的转捩过程的不同阶段也是有用的。
A new method of graphically representing the transition stages of a rotating-disk flow is presented. The probability density function contour map of the fluctuating azimuthal disturbance velocity is used to show the characteristics of the boundary-layer flow over the rotating disk as a function of Reynolds numbers. Compared with the variation of the disturbance amplitude (rms) or spectral distribution, this map more clearly shows the changing flow characteristics through the laminar, transitional, and turbulent regions. This method may also be useful to characterize the different stages in the transition process not only for the rotating-disk flow but also for other flows.