Combination of AC electrothermal and Dielectrophoresis realized by 3D Electrodes to Concentrate Particles

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  • In this paper, a particle microconcentrator is designed and simulated that works by combining the AC electrothermal (ACET) and Dielectrophoresis (DEP) forces. The microconcentrator consists of a PMMA channel with copper electrodes on the walls and bottom of the channel. On each side of the channel, two coplanar asymmetric electrodes are fixed. 10Vp voltage with a frequency of 500kHz is applied to the bigger electrodes and the smaller electrodes are grounded. The bottom electrode is a floating potential and not connected to any electric source. COMSOL Multiphysics v6 was used to simulate the electric field, heat transfer, and ACET induced vortices in the fluid. Then, the ACET and DEP forces were applied to the modeled polystyrene particles with a diameter of 6μm. Both forces affect the particles focusing, while the effect of ACET is stronger.

    Part of the Proceedings of the Canadian Society for Mechanical Engineering International Congress 2022.

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    Attribution-NonCommercial 4.0 International