Mesoscopic simulations of the counterion-induced electroosmotic flow - a comparative study

Details Mesoscopic simulations of the counterion-induced electroosmotic flow - a comparative study Mesoscopic simulations of the counterion-induced electroosmotic flow - a comparative study

2009-01-22

arxiv.org/abs/0901.3479v2

Physics

Condensed Matter

Other Condensed Matter

10 pages, 8 figures, 3 tables, additional references and minor changes in the text

Scientific paper

10.1063/1.3152844

We present mesoscopic simulations of the counterion-induced electroosmotic flow in different electrostatic coupling regimes. Two simulation methods are compared, Dissipative Particle Dynamics (DPD) and coupled Lattice-Boltzmann/Molecular Dynamics (LB/MD). A general mapping scheme to match DPD to LB/MD is developed. For the weak-coupling regime, analytic expressions for the flow profiles in the presence of partial-slip as well as no-slip boundary conditions are derived from the Poisson-Boltzmann and Stokes equations, which are in good agreement with the numerical results. The influence of electrofriction and partial slip on the flow profiles is discussed.

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