Turbulence-Condensate Interaction in Two Dimensions

被引：65

作者：

Xia, H. ^{[1
]}

Punzmann, H. ^{[1
]}

Falkovich, G. ^{[2
]}

Shats, M. G. ^{[1
]}

机构：

[1] Australian Natl Univ, Canberra, ACT 0200, Australia

[2] Weizmann Inst Sci, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 19期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.194504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present experimental results on turbulence generated in thin fluid layers in the presence of a large-scale coherent flow, or a spectral condensate. It is shown that the condensate modifies the third-order velocity moment in a much wider interval of scales than the second one. The modification may include the change of sign of the third moment in the inverse cascade. This observation may help resolve a controversy on the energy flux in mesoscale atmospheric turbulence (10-500 km): to recover a correct energy flux from the third velocity moment one needs first to subtract the coherent flow. We find that the condensate also increases the velocity flatness.

引用

页数：4

共 26 条

[1] Conformal invariance in two-dimensional turbulence [J].