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

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arxiv 0901.3479 v2 pith:Z2ZQIS2T submitted 2009-01-22 cond-mat.other

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

Jens Smiatek , Marcello Sega , Christian Holm , Ulf D. Schiller , Friederike Schmid This is my paper
classification cond-mat.other
keywords flowcounterion-induceddynamicselectroosmoticmesoscopicprofilessimulationsagreement
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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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