Quantifying turbulence-induced segregation of inertial particles

被引：73

作者：

Calzavarini, Enrico ^{[1
,2
]}

Cencini, Massimo ^{[3
,4
]}

Lohse, Detlef ^{[1
,2
]}

Toschi, Federico ^{[5
,6
]}

机构：

[1] Univ Twente, Dept Appl Phys, JMBC Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, IMPACT Inst, NL-7500 AE Enschede, Netherlands

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.101.084504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Particles with different density from the advecting turbulent fluids cluster due to the different response of light and heavy particles to turbulent fluctuations. This study focuses on the quantitative characterization of the segregation of dilute polydisperse inertial particles evolving in turbulent flow, as obtained from direct numerical simulation of homogeneous isotropic turbulence. We introduce an indicator of segregation amongst particles of different inertia and/or size, from which a length scale r(seg), quantifying the segregation degree between two particle types, is deduced.

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页数：4

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