湍流边界层中重粒子弥散的随机模型

计算物理 ›› 2004, Vol. 21 ›› Issue (6): 515-522.

湍流边界层中重粒子弥散的随机模型

郭宇¹, 崔桂香¹, 许春晓¹, 张兆顺¹, Michel Ayrault²

1. 清华大学工程力学系, 北京 100084;
2. 里昂中央理工大学, 法国

收稿日期:2004-08-26 修回日期:2006-12-30 出版日期:2004-11-25 发布日期:2004-11-25
作者简介:郭宇(1980-),男,河北,硕士生,从事湍流数值计算方面的研究.

A Stochastic Model of Heavy Particle Dispersion in Turbulent Boundary Layer

GUO Yu¹, CUI Gui-xiang¹, XU Chun-xiao¹, ZHANG Zhao-shun¹, Michel AYRAULT²

1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
2. Laboratory of Fluid Mechanics and Acoustics, Ecole Centrale de Lyon, France

Received:2004-08-26 Revised:2006-12-30 Online:2004-11-25 Published:2004-11-25

摘要/Abstract

摘要： 在重粒子轨道模型的基础上,引入了Saffman力,并考虑了粒子-固壁碰撞和粒子-粒子碰撞的影响,建立了重粒子运动方程,耦合湍流脉动的随机方程,发展了重粒子弥散的随机模型,并在湍流边界层中考察该模型.将数值计算结果与实验结果进行比较,同时考察了Saffman力和粒子碰撞对计算结果的影响.

关键词: 重粒子, 弥散, 随机模型, 质量通量

Abstract: A stochastic model of heavy particle dispersion is proposed.It is based on the coupling of the stochastic equation of turbulent fluid motion with the heavy particle crossing trajectory equation in which Saffman force,particle-wall collision and particle-particle collision are included.The model is also tested in a turbulent boundary layer with heavy particles.The numerical results are in good agreement with previous experimental data.The effect of Saffman force and particle collision on the heavy particle dispersion is investigated numerically as well.

Key words: heavy particle, dispersion, stochastic model, mass flux

中图分类号:

O357.5

郭宇, 崔桂香, 许春晓, 张兆顺, Michel Ayrault. 湍流边界层中重粒子弥散的随机模型[J]. 计算物理, 2004, 21(6): 515-522.

GUO Yu, CUI Gui-xiang, XU Chun-xiao, ZHANG Zhao-shun, Michel AYRAULT. A Stochastic Model of Heavy Particle Dispersion in Turbulent Boundary Layer[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2004, 21(6): 515-522.

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