Acceleration statistics of finite-sized particles in turbulent flow: the role of Faxen forces

被引：96

作者：

Calzavarini, E. ^{[1
,2
]}

Volk, R. ^{[1
,2
]}

Bourgoin, M. ^{[3
]}

Leveque, E. ^{[1
,2
]}

Pinton, J. -F. ^{[1
,2
]}

Toschi, F. ^{[4
,5
]}

机构：

[1] Ecole Normale Super Lyon, Phys Lab, CNRS, F-69007 Lyon, France

[2] Univ Lyon, F-69007 Lyon, France

[3] CNRS UJF INPG, UMR5519, Lab Ecoulements Geophys & Ind, F-38041 Grenoble, France

[4] Eindhoven Univ Technol, Dept Phys, NL-5600 MB Eindhoven, Netherlands

[5] Eindhoven Univ Technol, Dept Math & Comp Sci, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF FLUID MECHANICS | 2009年 / 630卷

关键词：

FULLY-DEVELOPED TURBULENCE; INERTIAL PARTICLES; BUBBLE; SPHERE; DYNAMICS; EQUATION; MOTION; FLUID; HEAVY; LIFT;

D O I：

10.1017/S0022112009006880

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The dynamics of particles in turbulence when the particle size is larger than the dissipative scale of the carrier flow are studied. Recent experiments have highlighted signatures of particles' finiteness on their statistical properties, namely a decrease of their acceleration variance, an increase of correlation times (at increasing the particles size) and an independence of the probability density function of the acceleration once normalized to their variance. These effects are not captured by point-particle models. By means of a detailed comparison between numerical simulations and experimental data, we show that a more accurate description is obtained once Faxen corrections are included.

引用

页码：179 / 189

页数：11

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