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Numerical simulation of Microfluidic flow and it’s mixing under the effect of zeta-potential are implemented on the platform of lattice Boltzmann method (LBM). Two dimensional and three dimensional micro-mixing models are designed respectively with different geometry distribution of Zeta-potential. For the two dimensional mixing model, the spatially heterogeneous zeta-potential is distributed periodically along the upper and bottom wall of the microchannel due to the distribution of rectangular electrodes, the magnitude of zeta-potential on the electrodes is modulated by AC with respect to time. For the three dimensional design, zeta-potential is also distributed heterogeneously, but the electrodes are of trapezoidal shapes and the magnitude of zeta-potential on the electrodes are constant, which can drive the fluid flow to generate cross flow. The mixing results of the latter one are compared with those obtained by the commercial code CFX. Comparison of the mixing results getting from two methods indicates good agreement. In simulating fluid mixing behavior under the effect of zeta-potential, LBM featured by the simplicity of its algorithm is proved to be an effective CFD method.

목차

Abstract
1. Introduction
2. Lattice Boltzmann Method
3. Microchannel flow mixing models and simulation results
4. Conclusion
Acknowledgement
References

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UCI(KEPA) : I410-ECN-0101-2010-554-002112347