Local-focusing phenomenon and turbulence modulation in particle-laden turbulent jets

被引：6

作者：

Luo, K ^{[1
]}

Fan, HR

Cen, KF

机构：

[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Inst Thermal Power Engn, Hangzhou 310027, Peoples R China

来源：

PHYSICS LETTERS A | 2005年 / 343卷 / 1-3期

关键词：

direct numerical simulation; two-way coupling; large-scale vortex structures; particle dispersion; turbulence modulation;

D O I：

10.1016/j.physleta.2005.05.078

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A direct numerical simulation (DNS) technique based on two-way coupling is presented to study a particle-laden, weakly compressible turbulent plane jet. The physical characteristics of particle dispersion and turbulence modulation are investigated. It is found that a local-focusing phenomenon happens to the dispersion of the particles at the Stokes number of 1. As a whole, the particles at the Stokes number of 0.01 and 50 make the two-way coupled profiles of turbulence intensity wider and lower, but the particles at the Stokes number of 1 decrease turbulence intensities. This method is feasible and convenient to study the physical interactions between the continuum phase fluid and the dispersed solid particles at different Stokes numbers. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：190 / 198

页数：9

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