论文标题
壁湍流中两点统计的对数和非同志缩放定律
Logarithmic and nonlogarithmic scaling laws of two-point statistics in wall turbulence
论文作者
论文摘要
壁湍流具有一个子层，其中一分点统计数据，例如，平均速度和某些速度波动的方差随着距墙壁的距离而变化。此对数尺度在这里可以通过风隧道中的实验进行两点统计或这些波动的两点累积。至于能量耗散速率的相应统计量，发现缩放不是对数。我们使用一些数学以及附着在墙上的含能量涡流的模型来重现这些缩放定律。
Wall turbulence has a sublayer where one-point statistics, e.g., the mean velocity and the variances of some velocity fluctuations, vary logarithmically with the distance from the wall. This logarithmic scaling is found here for two-point statistics or specifically two-point cumulants of those fluctuations by means of experiments in a wind tunnel. As for corresponding statistics of the rate of the energy dissipation, the scaling is found to be not logarithmic. We reproduce these scaling laws with some mathematics and also with a model of energy-containing eddies that are attached to the wall.
