STRETCHING AND DISTORTION OF MATERIAL LINE ELEMENTS IN 2-DIMENSIONAL TURBULENCE

被引：11

作者：

ISHIHARA, T

KANEDA, Y

机构：

[1] Department of Applied Physics, Nagoya University, Chikusa-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1992年 / 61卷 / 10期

关键词：

MATERIAL LINE ELEMENTS; STRETCHING; CURVATURE; DYNAMIC SHORT TIME ANALYSIS;

D O I：

10.1143/JPSJ.61.3547

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A study is made of the stretching and distortion of material line elements in turbulence both analytically and numerically. Approximations for the statistics of these processes derived by perturbative expansions are tested by comparison with dynamical simulations in two dimensions. An integral time scale associated with the Lagrangian statistics of the velocity gradients plays a key role in the approximations. A rough estimation of the time scale is obtained by a dynamical short-time analysis by making use of the Navier-Stokes equation.

引用

页码：3547 / 3558

页数：12

共 7 条

[1] TURBULENT STRETCHING OF LINE AND SURFACE ELEMENTS [J].