title: Direct numerical simulations of electrophoresis of charged colloids.
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.
authors.affiliation: Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Kang
authors.initials: K
authors.lastname: Kim
authors.forename: Yasuya
authors.initials: Y
authors.lastname: Nakayama
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Yamamoto
mesh_terms: D003102:Colloids / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D004586:Electrophoresis / Q000379:methods*; D008956:Models, Chemical
chemical_list: D003102:Colloids