This title appears in the Scientific Report :
2018
Please use the identifier:
http://hdl.handle.net/2128/20790 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.5020377 in citations.
Mesoscopic electrohydrodynamic simulations of binary colloidal suspensions
Mesoscopic electrohydrodynamic simulations of binary colloidal suspensions
A model is presented for the solution of electrokinetic phenomena of colloidal suspensions in fluid mixtures. We solve the discrete Boltzmann equation with a Bhatnagar-Gross-Krook collision operator using the lattice Boltzmann method to simulate binary fluid flows. Solvent-solvent and solvent-solute...
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Personal Name(s): | Rivas, Nicolas |
---|---|
Frijters, Stefan / Pagonabarraga, Ignacio / Harting, Jens | |
Contributing Institute: |
JARA - HPC; JARA-HPC Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: | The journal of chemical physics, 148 (2018) 14, S. 144101 |
Imprint: |
Melville, NY
American Institute of Physics
2018
|
DOI: |
10.1063/1.5020377 |
PubMed ID: |
29655348 |
Document Type: |
Journal Article |
Research Program: |
Dynamics of complex fluids Solar cells of the next generation |
Link: |
Published on 2018-04-09. Available in OpenAccess from 2019-04-09. Published on 2018-04-09. Available in OpenAccess from 2019-04-09. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1063/1.5020377 in citations.
A model is presented for the solution of electrokinetic phenomena of colloidal suspensions in fluid mixtures. We solve the discrete Boltzmann equation with a Bhatnagar-Gross-Krook collision operator using the lattice Boltzmann method to simulate binary fluid flows. Solvent-solvent and solvent-solute interactions are implemented using a pseudopotential model. The Nernst-Planck equation, describing the kinetics of dissolved ion species, is solved using a finite difference discretization based on the link-flux method. The colloids are resolved on the lattice and coupled to the hydrodynamics and electrokinetics through appropriate boundary conditions. We present the first full integration of these three elements. The model is validated by comparing with known analytic solutions of ionic distributions at fluid interfaces, dielectric droplet deformations, and the electrophoretic mobility of colloidal suspensions. Its possibilities are explored by considering various physical systems, such as breakup of charged and neutral droplets and colloidal dynamics at either planar or spherical fluid interfaces. |