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arXiv · 0901.3479

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

Jens Smiatek·Marcello Sega·Christian Holm·Ulf D. Schiller·Friederike Schmid
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Abstract

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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Jens Smiatek, Marcello Sega, Christian Holm, Ulf D. Schiller, Friederike Schmid. 2009-05-19. Mesoscopic simulations of the counterion-induced electroosmotic flow - a comparative study. https://doi.org/10.1063/1.3152844

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