TIME AVERAGING IN TURBULENCE SETTINGS MAY REVEAL AN INFINITE HIERARCHY OF LENGTH SCALES

TIME AVERAGING IN TURBULENCE SETTINGS MAY REVEAL AN INFINITE HIERARCHY OF LENGTH SCALES
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湍流设置中的时间平均可能会揭示长度尺度的无限层次结构

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
T. Wei
T. Wei
中科院分区：
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文献类型：
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作者：
P. Fife;J. Klewicki;T. Wei

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稳态湍流关键特征识别问题 毗邻墙壁引起了一些最著名的人的注意 有史以来的流体动力学家。此类功能的标准示例 在湍流的平均速度分布中发现 通道、管道或边界层。本文的目的是 解释并进一步发展最近的缩放概念 不可压缩运动的时间平均方程的补丁 由于固定边界处的摩擦而产生高度湍流的流动 （Wei 等人、Fife 等人和 Klewicki 最近的论文中介绍 等）除了概述识别补丁的方法之外， 提供平均轮廓的标度结构，这是一个关键 将对该方法与更传统的方法进行比较 那些。   我们的重点是如何以及做得如何的问题 这些论点提供了对结构的洞察 平均流量剖面。尽管实证结果可能会引发 寻找解释时，它们将被简单地视为 意味着达到这个目的。
The problem of discerning key features of steady turbulent flow adjacent to a wall has drawn the attention of some of the most noted fluid dynamicists of all time. Standard examples of such features are found in the mean velocity profiles of turbulent flow in channels, pipes or boundary layers. The aim of this article is to explain and further develop the recent concept of scaling patch for the time-averaged equations of motion of incompressible flow made highly turbulent by friction at a fixed boundary (introduced in recent papers by Wei et al, Fife et al, and Klewicki et al.) Besides outlining ways to identify the patches, which provide the scaling structure of mean profiles, a critical comparison will be made between that approach and more traditional ones.   Our emphasis will be on the question of how and how well these arguments supply insight into the structure of the mean flow profiles. Although empirical results may initiate the search for explanations, they will be viewed simply as means to that end.