论文标题
在高雷诺数字上缩放腐烂的湍流
Scaling in Decaying Turbulence at High Reynolds Numbers
论文作者
论文摘要
增量尺寸的湍流速度波动尺度的增量统计数据是湍流理论的核心。我们报告了最大Planck可变密度湍流隧道（VDTT）中腐烂的湍流的数据，该数据显示了惯性范围统计量在小尺度上朝着非平凡形状的方法。通过使用模型纠正能源衰减对大规模统计的贡献，我们发现二阶速度增量统计数据的缩放指数独立于雷诺数，等于$ 0.693 \ pm0.003 $，价格为$ 2000 \ lyssimr_λ\ lyssim 6000 $。这是高雷诺数在高雷诺数处的普遍惯性范围的证据。
The way the increment statistics of turbulent velocity fluctuations scale with the increment size is a centerpiece of turbulence theories. We report data on decaying turbulence in the Max Planck Variable Density Turbulence Tunnel (VDTT), which show an approach of the inertial range statistics toward a nontrivial shape at small scales. By correcting for the contributions of energy decay to the large-scale statistics with a model, we find the scaling exponent of the second-order velocity increment statistics to be independent of the Reynolds number and equal to $0.693\pm0.003$ for $2000\lesssim R_λ \lesssim 6000$. This is evidence of a universal inertial range at high Reynolds numbers.
