Numerical simulation of particle sedimentation in 3D rectangular channel |
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Authors: | Email author" target="_blank">Ma-lin?LiuEmail author |
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Institution: | Institute of Nuclear and New Energy Technology, Tsinghua University,Beijing 100084, P. R. China |
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Abstract: | The 3D lattice Boltzmann method is used to simulate particle sedimentation in a rectangular channel. The results of single
particle sedimentation indicate that the last position of the particle is along the center line of the channel regardless
of the initial position, the particle diameter, and the particle Reynolds number. The wall effect on the terminal velocity
is in good agreement with experimental results quantitatively. The drafting, kissing, and tumbling (DKT) process is reproduced
and analyzed by simulating two-particle cluster sedimentation. The effects of the diameter ratio, initial position, and wall
on the DKT process are investigated. When the two particles have equal diameter sediment in the rectangular channel, a periodical
DKT process and the spiraling trajectory are found. The last equilibrium configuration is obtained from the simulation results.
The interesting regular sedimentation phenomena are found when 49 particles fall down under gravity. |
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Keywords: | sedimentation lattice Boltzmann method particle-particle interaction |
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