SECOND-ORDER MODELLING OF PARTICLE DISPERSION IN A TURBULENT FLOW.

被引：0

作者：

Shih, Tsan-Hsing ^{[1
]}

Lumley, J.L. ^{[1
]}

机构：

[1] Cornell Univ, Sibley Sch of, Mechanical & Aerospace, Engineering, Ithaca, NY, USA, Cornell Univ, Sibley Sch of Mechanical & Aerospace Engineering, Ithaca, NY, USA

来源：

Journal of Fluid Mechanics | 1986年 / 163卷

关键词：

DIFFUSION - MATHEMATICAL MODELS;

D O I：

暂无

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A set of second-order modelled equations for the motion of particles are presented. We consider the effects of the particle inertia and the crossing-trajectories effect on the particle dispersion. A simple case of a particle mixing layer in a decaying homogeneous turbulent for light and heavy particles is calculated. The results show that the crossing-trajectories effect on particle dispersion is very significant, while inertia only has a slight effect. This behaviour has been observed in experiments and is well predicted by an asymptotic analysis. The calculation also shows that there is a significant difference between Favre-averaged particle velocity and conventional-averaged particle velocity in the low-particle-concentration region. All calculations are in good agreement with M. R. Wells & D. E. Stock's experimental data.

引用

页码：349 / 363

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