首页> 外文会议>International conference on nanochannels, microchannels and minichannels;ICNMM2009 >KINETICS OF COLLOIDAL PARTICLE DEPOSITION FROM ELECTROKINETIC MICROFLUIDIC FLOWS
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KINETICS OF COLLOIDAL PARTICLE DEPOSITION FROM ELECTROKINETIC MICROFLUIDIC FLOWS

机译:电动微流中胶体颗粒沉积的动力学

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This paper presents a theoretical and experimental investigation on the irreversible deposition of colloidal particles from electrokinetic microfluidic flow in parallel plate channels. The electrokinetic particle transport model presented in this study is based on the stochastic Langevin equation, incorporating the electrical, hydrodynamic, DLVO colloidal interactions and random Brownian motion of colloidal particles. The particle trajectories are computed via the Brownian dynamics simulation technique and the particle deposition is quantified in terms of the surface coverage. Direct videomicroscopic observation using the parallel-plate flow cell technique, is employed to determine the deposition kinetics of polystyrene latex particles in NaCl electrolytes. The theoretical predictions are compared with experimental results, and a reasonable agreement is found.
机译:本文提出了从电动微流在平行板通道中胶体粒子不可逆沉积的理论和实验研究。本研究中提出的电动粒子传输模型基于随机Langevin方程,并结合了胶体粒子的电,流体动力学,DLVO胶体相互作用和随机布朗运动。通过布朗动力学模拟技术计算颗粒轨迹,并根据表面覆盖率对颗粒沉积进行量化。使用平行板流动池技术进行直接视频显微镜观察,以确定聚苯乙烯胶乳颗粒在NaCl电解质中的沉积动力学。将理论预测与实验结果进行比较,发现合理的一致性。

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