标题： 湍流通道的3D结构直至$\mathrm{Re}_τ=4000$ 显示英文标题

标题： The 3D structure of turbulent channels up to $\mathrm{Re}_τ=4000$

摘要： 多个从$\mathrm{Re}_\tau=180$到$\mathrm{Re}_\tau=4000$的湍流通道的时变流体动力学视频被展示。 视频显示了通道一半中脉动（蓝色）和喷出（红色）随时间的变化情况（仅显示底部壁面）。 颜色从靠近壁面的点的暗色变为到达通道中心的点的亮色。 随着雷诺数的增加，尺度分离变得更加明显，所观察到的动力学复杂性也随之增加。 显示英文摘要

摘要： Several time-resolved fluid dynamics videos of turbulent channels from $\mathrm{Re}_\tau=180$ to $\mathrm{Re}_\tau=4000$ are presented. The videos show the temporal evolution of sweeps (bluish) and ejections (reddish) in one half of the channel (only the bottom wall is shown). The color changes from dark for points close to the wall, to bright for those reaching the center of the channel. As the Reynolds number increases the scale separation becomes more clear and the complexity of the dynamics observed rises.