PASSIVE-SCALAR FLUCTUATIONS IN INTERMITTENT TURBULENCE

被引：4

作者：

CRISANTI, A

FALCIONI, M

PALADIN, G

VULPIANI, A

机构：

[1] UNIV LAUSANNE,INST PHYS THEOR,CH-1015 LAUSANNE,SWITZERLAND

[2] UNIV ROME LA SAPIENZA,DIPARTMENTO FIS,I-00185 ROME,ITALY

[3] UNIV AQUILA,DIPARTIMENTO FIS,I-67010 COPPITO,ITALY

来源：

EUROPHYSICS LETTERS | 1991年 / 14卷 / 06期

关键词：

D O I：

10.1209/0295-5075/14/6/007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss how the spatial intermittency of energy dissipation in 3D fully developed turbulence affects the small-scale statistics of passive scalars. We relate the passive-scalar behaviour to the diffusion properties of particle pairs in turbulent fluids. We thus find the intermittency correction to the -5/3 Obukhov-Corrsin law for the power spectrum of a passive scalar at wavenumber k where molecular diffusion and viscosity play a negligible role (inertial convective subrange). This correction is positive at difference with the negative correction to the -5/3 Kolmogorov law for the energy spectrum. We finally show that the structure functions of passive scalars have scaling exponents linear in the moment order, even in the framework of multifractal models.

引用

页码：541 / 546

页数：6

共 26 条

[1] HIGH-ORDER VELOCITY STRUCTURE FUNCTIONS IN TURBULENT SHEAR FLOWS [J].