Hydrodynamic model for particle clustering in electrophoretic deposition

Jerry JianJun Feng; Ying Xu

doi:10.1117/12.359330

Abstract

Recent experimental observation of electrophoretic deposition of colloid particles onto flat conducting electrodes indicates that particles may form ordered clusters. However, in many applications such as reverse roll coating process in color printing industry, the electrode may not be perfect conducting. In the present paper, a model is developed to account for the effect of a dielectric layer on the electrode. Also, for inkjet printers design, in order to achieve high resolution, small droplets and controllable cluster are needed. We present in this paper a hydrodynamic model based on the thin double layer approximation. The rearrangement of adjacent particles in response to the induced electroosmotic field is computed using a similar model for conducting electrode. Cluster time for different initial configurations is presented to demonstrate the new features of the model. Comparison with conducting electrode is made for certain configurations. New features have been revealed and application in several chemical processes, especially in color coating are discussed. The model presented in this paper can provide theoretical basis for high resolution and high printing speed design in relevant application.

Citation Download Citation

Jerry JianJun Feng, Jerry JianJun Feng, Ying Xu, Ying Xu, } "Hydrodynamic model for particle clustering in electrophoretic deposition", Proc. SPIE 3877, Microfluidic Devices and Systems II, (19 August 1999); doi: 10.1117/12.359330; https://doi.org/10.1117/12.359330

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