Dynamics of two elliptical particles sedimentation in a vertical channel: chaotic state |
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| Authors: | Deming Nie Jianzhong Lin |
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| Affiliation: | 1. State Key Laboratory of Fluid Power Transmission and Control , Zhejiang University , Hangzhou, 310027, China;2. College of Metrology and Technology Engineering , China Jiliang University , Hangzhou, 310018, China mecjzlin@public.zju.edu.cn;4. College of Metrology and Technology Engineering , China Jiliang University , Hangzhou, 310018, China |
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| Abstract: | The LB-DF/FD method derived from the Lattice Boltzmann Method and direct forcing/fictitious domain method is used to numerically investigate the dynamics and interaction of two elliptical particles settling in an infinitely long channel. One particle (EP0) is initially kept horizontal (major axis perpendicular to sedimentation) for all simulations while the other's (EP1) orientation is varied. It is found that if EP1strays away from horizontality, the particles undergo transitions from a steady state to reach a chaotic state. Furthermore, there are two distinct chaotic states for the particle motion when EP1 orientation is varied, in which a turning point is observed to distinguish the two states. |
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| Keywords: | particle motion elliptical particles chaotic state sedimentation Lattice Boltzmann Method |
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