VORTEX STRUCTURE AND DYNAMICS IN TURBULENCE

被引：5

作者：

SHE, ZS

JACKSON, E

ORSZAG, SA

机构：

[1] Applied and Computational Mathematics, Princeton University, Princeton

来源：

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1990年 / 80卷 / 1-3期

关键词：

D O I：

10.1016/0045-7825(90)90021-D

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamics of vortex structures in turbulence have been investigated statistically in pseudospectral numerical simulations of moderate Reynolds number turbulence. Coherent features of vortex stretching dynamics, as manifested in the alignment of the vorticity vector with a principal axis of the rate of strain, are investigated with an emphasis on their time development in turbulence decay from a random gaussian field. In addition, we have observed a tendency in developed turbulence for velocity vectors to lie in the plane formed by the two principal stretching directions. These phenomena provide a mechanism for depletion of nonlinearity in turbulence. The spatial and temporal coherence of vortex structures has been further studied using recently developed techniques which combine dynamical visualisation with statistical sampling analysis. © 1990.

引用

页码：173 / 183

页数：11

共 20 条

[1] ALIGNMENT OF VORTICITY AND SCALAR GRADIENT WITH STRAIN RATE IN SIMULATED NAVIER-STOKES TURBULENCE [J].