Study on the interaction of sedimenting cylindrical particles in still fluid |
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| Authors: | Lin Jianzhong Shao Xueming Shi Xing Yu Zhaosheng |
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| Institution: | (1) Department of Mechanics, the State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, 310027 Hangzhou, China;(2) Department of Mechanical and Mechatronic Engineering, University of Sydney, 2006, NSW, Australia |
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| Abstract: | 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.
The project supported by the National Natural Science Foundation of China for Distinguished Scholars (19925210) |
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| Keywords: | cylindrical particle sedimentation lattice Boltzmann method interaction |
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