ENERGY AND STABILITY OF VORTEX RINGS IN LIQUID HELIUM 2 - CRITICAL VELOCITIES

被引：9

作者：

VANVIJFEJKEN, AG

WALRAVEN, A

STAAS, FA

机构：

[1] Philips Research Laboratories, N.V. Philips' Gloeilampenfabrieken, Eindhoven

来源：

PHYSICA | 1969年 / 44卷 / 03期

关键词：

D O I：

10.1016/0031-8914(69)90216-X

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper quantized vortex rings in tubes of circular cross section are studied. The energy and momentum associated with confined vortex rings are calculated. It is shown that a confined ring carries no momentum. This fact makes the application of Landau's criterion for the critical velocity at which vortex rings are created, doubtful. A new criterion for νc, based on mechanical equilibrium for a ring, is proposed and applied. It leads to an expression for νc which contains both the diameter of the tube and the distance from the wall at which a ring is created. From a comparison with experiments this distance is estimated. In addition, the time needed for the creation of a ring is calculated. © 1969.

引用

页码：415 / +

页数：1

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