Direct Numerical Simulations of Electrophoresis of Charged Colloids

2006/01/31 by Kang Kim, Yasuya Nakayama, Ryoichi Yamamoto +1 · 6 citations
Chemistry · Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Electrostatics and Colloid Interactions #Geophysical and Geoelectrical Methods #Microfluidic and Bio-sensing Technologies #cond-mat.soft

paper · pdf · doi:10.1103/physrevlett.96.208302

published as Phys. Rev. Lett. 96, 208302 (2006) · 4pages, 3figures, to appear in Phys. Rev. Lett

arxiv created 2006/04/27 · openalex publication_date 2006/05/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

Cited by

• Structure and short-time dynamics in suspensions of charged silica spheres in the entire fluid regime
• A Dissipative-Particle-Dynamics Model for Simulating Dynamics of Charged Colloids
• Electrophoresis of Colloidal Dispersions in the Low-Salt Regime
• Colloidal electrophoresis: scaling analysis, Green–Kubo relation, and numerical results
• A Numerical Model for Brownian Particles Fluctuating in Incompressible Fluids
• Interplay between hydrodynamic and Brownian fluctuations in sedimenting colloidal suspensions