Finite time transport in aperiodic flows

被引：180

作者：

Haller, G ^{[1
]}

Poje, AC ^{[1
]}

机构：

[1] Brown Univ, Div Appl Math, Providence, RI 02906 USA

来源：

PHYSICA D-NONLINEAR PHENOMENA | 1998年 / 119卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0167-2789(98)00091-8

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We study the transport of particles in a general, two-dimensional, incompressible flow in the presence of a transient eddy, i.e., a bounded set of closed streamlines with a finite time of existence. Using quantities obtained from Eulerian observations, we provide explicit conditions for the existence of a hyperbolic structure in the how, which induces mixing between the eddy and its environment. Our results can be used directly to study finite-time transport in numerically or experimentally generated vector fields with general time-dependence. (C) 1998 Elsevier Science B.V.

引用

页码：352 / 380

页数：29

共 37 条

[1] Viscous perturbations of vorticity-conserving flows and separatrix splitting [J].