Wavelet-based analysis of enstrophy transfers in two-dimensional turbulence

被引：3

作者：

Fischer, Patrick ^{[1
]}

Bruneau, Charles-Henri ^{[1
]}

机构：

[1] Univ Bordeaux 1, IMB, INRIA, Team MC2,CNRS,UMR 5251, F-33405 Talence, France

来源：

PHYSICS OF FLUIDS | 2009年 / 21卷 / 06期

关键词：

turbulence; vortices; wavelet transforms; KINETIC-ENERGY SPECTRUM; INVERSE ENERGY; CASCADE; SIMULATION; RANGES;

D O I：

10.1063/1.3153910

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Two-dimensional turbulence admits two different ranges of scales: a direct enstrophy cascade from the injection scale to the small scales and an inverse energy cascade at large scales. It has already been shown in previous papers that vortical structures are responsible for the transfers of energy upscale while filamentary structures are responsible for the forward transfer of the enstrophy. Here we propose an original mathematical tool, the interaction function, for studying the space localization of the enstrophy fluxes. It is defined using an orthogonal two-dimensional wavelet decomposition.

引用

页数：11

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