论文标题
探索动荡的泰勒卷的起源
Exploring the origin of Turbulent Taylor rolls
论文作者
论文摘要
自从泰勒（Taylor）的开创性论文以来，在研究泰勒 - 库特（Taylor-Couette）流动时，大规模准轴对称结构的存在一直是一个有趣的问题。在本手稿中，我们通过在固定的雷诺数上进行一系列数值模拟$ re_s = 3.6 \ times 10^4 $，同时改变Coriolis参数以分析流动特性作为结构出现和消散，从而探究了它们在高度湍流方案中的形成。我们展示了Coriolis力如何在边界层内部的径向和方位角速度场之间诱导单向耦合，但是在整体中，有一个双向耦合会引起竞争效应。我们讨论这如何使狭窄的taylor-couette与其他对流流的类比变得复杂。然后，我们将这些统计数据与没有防滑边界层的类似剪切流进行比较，显示了这种双重耦合如何产生非常不同的效果。我们通过反思湍流泰勒卷的可能起源来结束。
Since Taylor's seminal paper, the existence of large-scale quasi-axisymmetric structures has been a matter of interest when studying Taylor-Couette flow. In this manuscript, we probe their formation in the highly turbulent regime by conducting a series of numerical simulations at a fixed Reynolds number $Re_s=3.6\times 10^4$ while varying the Coriolis parameter to analyze the flow characteristics as the structures arise and dissipate. We show how the Coriolis force induces a one-way coupling between the radial and azimuthal velocity fields inside the boundary layer, but in the bulk there is a two-way coupling that causes competing effects. We discuss how this complicates the analogy of narrow-gap Taylor-Couette to other convective flows. We then compare these statistics to a similar shear flow without no-slip boundary layers, showing how this double coupling causes very different effects. We finish by reflecting on the possible origins of turbulent Taylor rolls.
