Lyapunov exponents of heavy particles in turbulence

被引：85

作者：

Bec, Jeremie

Biferale, Luca

Boffetta, Guido

Cencini, Massimo

Musacchio, Stefano

Toschi, Federico

机构：

[1] Observ Cote Azur, CNRS, UMR 6202, F-06304 Nice 4, France

[2] Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy

[3] Univ Roma Tor Vergata, Ist Nazl Fis Nucl, I-00133 Rome, Italy

[4] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy

[5] Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy

[6] CNR, ISAC, I-10133 Turin, Italy

[7] Univ Roma La Sapienza, INFM, CNR, SMC Dept Fis, I-00185 Rome, Italy

[8] CNR, ISC, I-00185 Rome, Italy

[9] CNRS, INLN, F-06560 Valbonne, France

[10] CNR, IAC, I-00161 Rome, Italy

[11] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

来源：

PHYSICS OF FLUIDS | 2006年 / 18卷 / 09期

关键词：

D O I：

10.1063/1.2349587

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Lyapunov exponents of heavy particles and tracers advected by homogeneous and isotropic turbulent flows are investigated by means of direct numerical simulations. For large values of the Stokes number, the main effect of inertia is to reduce the chaoticity with respect to fluid tracers. Conversely, for small inertia, a counterintuitive increase of the first Lyapunov exponent is observed. The flow intermittency is found to induce a Reynolds number dependency for the statistics of the finite-time Lyapunov exponents of tracers. Such intermittency effects are found to persist at increasing inertia. (c) 2006 American Institute of Physics.

引用

页数：4

共 18 条

[1]

[Anonymous], 1986, ENV POL SUS DEV

[2] Intermittent distribution of inertial particles in turbulent flows [J].