论文标题
超氟排水涡流
Superfluid drain vortex
论文作者
论文摘要
排水漩涡是在日常生活中观察到的最常见的涡旋之一，但是由于涡度的运输和扩散的竞争以及粘性层和自由表面的存在，它们的物理学很复杂。最近，已经有可能在超流体液氦中研究实验中排出涡旋，这种液体通过缺乏粘度和循环的定量来简化物理学。使用Gross-Pitaevskii方程式，我们制作了一个简单的问题模型，该模型捕获了必需物理成分，表明超流体排水管涡流由一束涡流线组成，从而增强了轴向流入排水管中的轴向。
Drain vortices are among the most common vortices observed in everyday life, yet their physics is complex due to the competition of vorticity's transport and diffusion, and the presence of viscous layers and a free surface. Recently, it has become possible to study experimentally drain vortices in superfluid liquid helium, a fluid in which the physics is simplified by the absence of viscosity and the quantisation of the circulation. Using the Gross-Pitaevskii equation, we make a simple model of the problem which captures the essential physics ingredients, showing that the superfluid drain vortex consists of a bundle of vortex lines which twist, thus strengthening the axial flow into the drain.
