AC-field-induced Polarization for Uncharged Colloids in Salt Solution: A Dissipative Particle Dynamics Simulation
arXiv:1303.2508 · doi:10.1140/epje/i2013-13033-0
Abstract
We study the response of a spherical colloid under alternating electric fields (AC-fields) by mesoscopic simulation method, accounting in full for hydrodynamic and electrostatic interactions. We focus on a special case of uncharged colloids. The main polarization mechanism is the "volume-polarization", where ionic currents are deflected by the core of the uncharged colloid. Specifically, we compute the polarizability of a single colloid and systematically investigate the effect of AC field frequency and salt concentration. The simulation results are compared with predictions from classical Maxwell-Wagner theory and electrokinetic theory.
11 pages, 9 figures, submitted to Eur. Phys. J. E
References in corpus (14)
- How to mesh up Ewald sums (I): A theoretical and numerical comparison of various particle mesh routines
- Hydrodynamic interactions and Brownian forces in colloidal suspensions: Coarse-graining over time and length-scales
- How to mesh up Ewald sums (II): An accurate error estimate for the P3M algorithm
- Electrophoresis of colloidal dispersions in the low-salt regime
- A new model for simulating colloidal dynamics
- Electrophoretic mobility of a charged colloidal particle: A computer simulation study
- Tunable-slip boundaries for coarse-grained simulations of fluid flow
- Mesoscopic simulations of the counterion-induced electroosmotic flow - a comparative study
- Combining Molecular Dynamics with Lattice-Boltzmann: A Hybrid Method for the Simulation of (Charged) Colloidal Systems
- Electrophoretic Properties of Highly Charged Colloids: A Hybrid MD/LB Simulation Study
- Colloids electrophoresis for strong and weak ion diffusivity
- Dielectric Response of Nanoscopic Spherical Colloids in Alternating Electric Fields: A Dissipative Particle Dynamics Simulation
- DC electrokinetics for spherical particles in salt-free concentrated suspensions including ion size effects
- Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension
Cited by in corpus (5)
- The Raspberry Model for Hydrodynamic Interactions Revisited. I. Periodic Arrays of Spheres and Dumbbells
- Dynamic and Dielectric Response of Charged Colloids in Electrolyte Solutions to External Electric Fields
- Computer Simulations of Charged Colloids in Alternating Electric Fields
- Computer simulations of single particles in external electric fields
- A Dissipative-Particle-Dynamics Model for Simulating Dynamics of Charged Colloid