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Open AccessArticle

Numerical Investigation of DC Dielectrophoretic Deformable Particle–Particle Interactions and Assembly

by 1, 2,*, 1,*, 1,*, 3,* and 2
1
Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China
2
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430070, China
3
State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun 130033, China
*
Authors to whom correspondence should be addressed.
Micromachines 2018, 9(6), 260; https://doi.org/10.3390/mi9060260
Received: 14 April 2018 / Revised: 20 May 2018 / Accepted: 22 May 2018 / Published: 25 May 2018
(This article belongs to the Special Issue Micro/Nano-Chip Electrokinetics, Volume II)
In a non-uniform electric field, the surface charge of the deformable particle is polarized, resulting in the dielectrophoretic force acting on the surface of the particle, which causes the electrophoresis. Due to dielectrophoretic force, the two deformable particles approach each other, and distort the flow field between them, which cause the hydrodynamic force correspondingly. The dielectrophoresis (DEP) force and the hydrodynamic force together form the net force acting on the particles. In this paper, based on a thin electric double layer (EDL) assumption, we developed a mathematical model under the arbitrary Lagrangian–Eulerian (ALE) numerical approach method to simulate the flow field, electric field, and deformable particles simultaneously. Simulation results show that, when two deformable particles’ distances are in a certain range, no matter the initial position of the two particles immersed in the fluid field, the particles will eventually form a particle–particle chain parallel to the direction of the electric field. In actual experiments, the biological cells used are deformable. Compared with the previous study on the DEP motion of the rigid particles, the research conclusion of this paper provides a more rigorous reference for the design of microfluidics. View Full-Text
Keywords: dielectrophoresis; particle assembly; particle interactions; arbitrary Lagrangian–Eulerian (ALE); microfluidics; fluid–structure interaction; Navies–Stokes equation dielectrophoresis; particle assembly; particle interactions; arbitrary Lagrangian–Eulerian (ALE); microfluidics; fluid–structure interaction; Navies–Stokes equation
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MDPI and ACS Style

Ji, X.; Xu, L.; Zhou, T.; Shi, L.; Deng, Y.; Li, J. Numerical Investigation of DC Dielectrophoretic Deformable Particle–Particle Interactions and Assembly. Micromachines 2018, 9, 260. https://doi.org/10.3390/mi9060260

AMA Style

Ji X, Xu L, Zhou T, Shi L, Deng Y, Li J. Numerical Investigation of DC Dielectrophoretic Deformable Particle–Particle Interactions and Assembly. Micromachines. 2018; 9(6):260. https://doi.org/10.3390/mi9060260

Chicago/Turabian Style

Ji, Xiang; Xu, Li; Zhou, Teng; Shi, Liuyong; Deng, Yongbo; Li, Jie. 2018. "Numerical Investigation of DC Dielectrophoretic Deformable Particle–Particle Interactions and Assembly" Micromachines 9, no. 6: 260. https://doi.org/10.3390/mi9060260

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