VORTEX STRIPPING AND THE GENERATION OF HIGH VORTICITY GRADIENTS IN 2-DIMENSIONAL FLOWS

被引：92

作者：

LEGRAS, B ^{[1
]}

DRITSCHEL, D ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,CAMBRIDGE CB3 9EW,ENGLAND

来源：

APPLIED SCIENTIFIC RESEARCH | 1993年 / 51卷 / 1-2期

关键词：

VORTEX DYNAMICS; COHERENT STRUCTURES; 2-DIMENSIONAL TURBULENCE;

D O I：

10.1007/BF01082574

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We study the stripping of vortices with monotonic vorticity profiles within adverse shear. It is shown that distributed vortices behave differently from uniform patches regarding the critical onset of tearing. Stripping erodes the exterior layers of a distributed profile and generates very high vorticity gradients at the edge of the vortex. These effects are measured, and a theory which allows a detailed quantification of the mechanism is presented.

引用

页码：445 / 455

页数：11