Solitary vortex pairs in viscoelastic Couette flow

被引：82

作者：

Groisman, A

Steinberg, V

机构：

[1] Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.78.1460

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report experimental observation of a localized structure, which is of a new type for dissipative systems. It appears as a solitary vortex pair (''diwhirl'') in Couette Bow with highly elastic polymer solutions. In contrast to the usual solitons the diwhirls are stationary. It is also a new object in fluid dynamics-a pair of vortices that build a single entity. The diwhirls rise as a result of a purely elastic instability through a hysteretic transition at negligible Reynolds numbers. It is suggested that the vortex flow is driven by the same forces that cause the Weissenberg effect.

引用

页码：1460 / 1463

页数：4

共 12 条

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