Reconnection of Quantized Vortices in Superfluid 4He
Reconnection of Quantized Vortices in Superfluid 4He
复制标题
超流体 4He 中量子化涡旋的重联
DOI：
10.1143/jpsj.61.2007
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发表时间：
1992
影响因子：
1.7
通讯作者：
S. Maekawa
中科院分区：
文献类型：
--
作者：
M. Tsubota;S. Maekawa
研究了两个相互作用的量子化涡丝的三维动力学。运动方程和数值计算方法遵循施瓦茨。本文介绍了两个细丝的方法，以及如何重新连接，所得到的结果不同于假设施瓦茨在模拟中使用的漩涡纠缠。两个接近的细丝是否重新连接取决于它们在接近之前的排列。例如，当一个环从一定距离向一条线移动时，只有在一个临界初始距离内它们才能重新连接。当它们的环流在最近的地方平行时，临界距离最小，而当它们的环流偏离平行时，临界距离增大。在这种对称的情况下，如两个相同的环碰撞，它们可以在自己身上做一些广泛的扭曲来重新连接。将我们的结果与施瓦茨的数值模拟进行了比较。
Three-dimensional dynamics of two interacting quantized vortex filaments is studied. The equations of motion and the method of numerical calculation follow Schwarz. The present paper describes when and how two filaments approach to reconnect; the obtained results differ from the assumption Schwarz used in the simulation of vortex tangle. Whether two approaching filaments reconnect or not depends on their arrangement before approach. When a ring moves toward a line from a distance, for example, there is a critical initial distance only within which they can reconnect. The critical distance is minimized when their circulations are parallel at the closest place, while it increases as their circulations become to deviate from being parallel. In such a symmetrical case as collision of two same rings, they can make some extensive twists on themselves to reconnect. Our results are compared with the numerical simulation by Schwarz.