Cascades in helical turbulence

被引：47

作者：

Ditlevsen, PD

Giuliani, P

机构：

[1] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[2] Univ Calabria, Dipartmento Fis, I-87036 Arcavacata Di Rende, CS, Italy

[3] Univ Calabria, Ist Nazl Fis Mat, I-87036 Arcavacata Di Rende, CS, Italy

来源：

PHYSICAL REVIEW E | 2001年 / 63卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.63.036304

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We suggest the existence of a characteristic inner scale xi for helicity dissipation in a regime of hydrodynamic fully developed turbulence and estimate it on dimensional grounds. This scale is always larger than the Kolmogorov scale eta and their ratio eta/xi vanishes in the high Reynolds number limit, so the flow will always be helicity free in the small scales. These ideas are illustrated in a shell model of turbulence.

引用

页数：4

共 16 条

[1] INFLUENCE OF HELICITY ON EVOLUTION OF ISOTROPIC TURBULENCE AT HIGH REYNOLDS-NUMBER [J].