Direct numerical simulations of electrophoresis of charged colloids
Direct numerical simulations of electrophoresis of charged colloids
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DOI：
10.1103/physrevlett.96.208302
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发表时间：
2006-05-26
影响因子：
8.6
通讯作者：
Yamamoto, Ryoichi
中科院分区：
文献类型：
--
作者：
Kim, Kang;Nakayama, Yasuya;Yamamoto, Ryoichi
我们提出了一种数值方法来模拟带电胶体分散体中的电流体动力学现象。该方法通过求解牛顿、对流扩散和Navier-Stokes方程，可以同时计算胶体粒子、离子和宿主流体的时间演化，从而充分考虑电流体动力学耦合。计算了几种情况下带电球形粒子的电泳迁移率。与近似理论的比较表明，没有任何经验参数的稀分散体的定量协议，但是，我们的模拟预测显着的偏差的情况下，密集的分散体。
We propose a numerical method to simulate electrohydrodynamic phenomena in charged colloidal dispersions. This method enables us to compute the time evolutions of colloidal particles, ions, and host fluids simultaneously by solving Newton, advection-diffusion, and Navier-Stokes equations so that the electrohydrodynamic couplings can be fully taken into account. The electrophoretic mobilities of charged spherical particles are calculated in several situations. The comparisons with approximation theories show quantitative agreements for dilute dispersions without any empirical parameters; however, our simulation predicts notable deviations in the case of dense dispersions.