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Sedimentation of a Single Charged Elliptic Cylinder in a Newtonian Fluid by Lattice Boltzmann Method |
| ZHANG Chao-Ying1;SHI Juan2;TAN Hui-Li1;LIU Mu-Ren1;KONG Ling-Jiang1 |
| 1College of Physics and Information Technology, Guangxi Normal University, Guilin 541004
2Department of Communication and Information Engineering, Guilin Institute of Electronic Technology, Guilin 541004 |
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| Cite this article: |
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ZHANG Chao-Ying, SHI Juan, TAN Hui-Li et al 2004 Chin. Phys. Lett. 21 1108-1110 |
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Abstract We simulate the sedimentation of single charged and single uncharged elliptic cylinders in a Newtonian fluid by using the lattice Boltzmann method. Due to the polarizing effects and non-axial symmetry shape, there are the Coulomb force and corresponding torque exerted on the charged elliptic cylinder during the sedimentation, which significantly change the horizontal translation and rotation of the cylinder. When the dielectric constant of the liquid is smaller than that of the wall, the direction of the Coulomb force is opposite to that of the hydrodynamic force. Therefore there appears to be a critical linear charge density qc at which the elliptic cylinder will fall vertically off the centreline.
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| Keywords:
47.60.+i
47.11.+j
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Published: 01 June 2004
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