湍流边界层中固体小颗粒湍流运动的Lagrangian模型

刘小兵; 程良骏

湍流边界层中固体小颗粒湍流运动的Lagrangian模型

刘小兵¹,
程良骏²

1.
四川工业学院, 成都 611744;
2.
华中理工大学, 武汉 430014

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- 被引次数: 0
出版历程
- 收稿日期: 1995-06-09
- 修回日期: 1996-10-30
- 刊出日期: 1997-03-15

Lagrangian Model on the Turbulent Motion of Small Solid Particle in Turbulent Boundary Layer Flows

Liu Xiaobing¹,
Cheng Liangjun²

1.
Sichuan Institute of Technology, Chengdu 611744, P. R. China;
2.
Huazhong University of Science & Technology, Wuhan 430074, P. R China

摘要

摘要: 给出了固体小颗粒在边界层中的Lagrangian运动方程,方程中包括受壁面影响的粘性阻力,Saffman升力及Magus升力等.使用频谱法,得到了颗粒响应流体的Lagrangian能谱的表达式,使用这些结果研究了各种响应特性.本文的结果清楚地表明了固体个颗粒在湍流扩散过程中,其湍流扩散是可能大于流体的.
- Lagrangian模型 /
- 湍流运动 /
- 固体颗粒 /
- 湍流边界层
Abstract: The Lagrangian equations of motion of small solid particle in turbulent boundary layer flows, taking into account the effects of the drag force caused by the wall presence, the Saffman and the Magus lift forces et al., is studied. Using the spectral method. anavtical expressions relating to the Lagrangian power spectra of particle velocity to that of the fluid are dereloped and the results are used to evaluate rarious response statistics. In this paper, the results clearly show that the turbulent diffusivity of the particle may be larger than that of fluid for a period of long-time.
- Lagrangian model /
- turbulent motion /
- small solid particle /
- turbulent boundary layer

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参考文献(19)

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