ZERO-HELICITY LAGRANGIAN KINEMATICS OF 3-DIMENSIONAL ADVECTION

被引：37

作者：

HOLM, DD ^{[1
]}

KIMURA, Y ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545

来源：

PHYSICS OF FLUIDS A-FLUID DYNAMICS | 1991年 / 3卷 / 05期

关键词：

D O I：

10.1063/1.858083

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The toroidal-poloidal decomposition for divergenceless vector fields in three dimensions is used to classify incompressible steady velocity fields in three dimensions according to whether they have zero, or nonzero helicity, and whether they are integrable, or nonintegrable as dynamical systems. Linearized steady Rayleigh-Benard convection flows provide examples from each class. Computational techniques that preserve volume and helicity are developed and used to visualize the Lagrangian particle trajectories of three-dimensional advection for two Rayleigh-Benard flows having zero helicity in a periodic domain.

引用

页码：1033 / 1038

页数：6

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