The JHU turbulence database [1] can be used with a state of the art visualisation tool [2] to generate high quality fluid dynamics videos. In this work we investigate the classical idea that smaller structures in turbulent flows, while engaged in their own internal dynamics, are advected by the larger structures. They are not advected undistorted, however. We see instead that the small scale structures are sheared and twisted by the larger scales. This illuminates the basic mechanisms of the turbulent cascade.

翻译：JHU湍流数据库[1]可与最先进的可视化工具[2]结合使用，生成高质量的流体动力学视频。本研究探讨了一个经典理论：湍流中的较小结构在参与自身内部动力学过程的同时，会受到较大结构的平流输运作用。然而，这些较小结构并非无畸变地随流运动。我们观察到，小尺度结构会受到大尺度结构的剪切与扭转作用。这一发现揭示了湍流级联的基本机制。