STUDY ON THE INTERACTION OF SEDIMENTING CYLINDRICAL PARTICLES IN STILL FLUID

The sedimentations of two cylindrical particles in three different initial relative positions are numerically simulated using the lattice Boltzmann method. The movement characteristics and particle interactions during their sedimentation are presented and discussed in detail. The results show that,...

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Bibliographic Details
Published in:Acta mechanica Sinica 2004-02, Vol.20 (1), p.32-45
Main Author: 林建忠 邵雪明 石兴 余钊圣
Format: Article
Language:English
Subjects:
圆柱形粒子
沉积作用
流体力学
相互作用
静态流
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Summary:The sedimentations of two cylindrical particles in three different initial relative positions are numerically simulated using the lattice Boltzmann method. The movement characteristics and particle interactions during their sedimentation are presented and discussed in detail. The results show that, (i) if the two particles are released parallel but separated horizontally, they push away each other, rotate inwards and separate horizontally as they fall; (ii) if the two particles are released parallel but separated vertically, the sedimentation behavior can be classified into three stages: trailing,tumbling and separating; (iii) if the two particles are released perpendicular but separated vertically,the sedimentation behavior can be characterized as: trailing and rotating, touching and sliding. In order to validate our simulation, experiments were also conducted and the results agree well with the numerical ones.
ISSN:0567-7718
1614-3116
DOI:10.1007/bf02493569