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Issue 9, 2013
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Computer simulations of colloidal particles under flow in microfluidic channels

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Abstract

We study the propagation of single, neutrally buoyant rigid spheres under pressure-driven flow by means of extensive computer simulations that correctly account for hydrodynamic interactions. We first consider a system geometry consisting of two parallel plane walls and achieve very good agreement with experimental results [M. E. Staben and R. H. Davis, Int. J. Multiphase Flow, 2005, 31, 529]. In the second part of our analysis, we simulate the flow of tracer particles through a hexagonal array of cylindrical obstacles, whose axis lies parallel to the gradient–vorticity plane of the flow. We find that the presence of the obstacles causes a significant slowdown of the tracer particles and that their velocities respond in a highly non-linear way to an increasing pressure drop.

Graphical abstract: Computer simulations of colloidal particles under flow in microfluidic channels

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Publication details

The article was received on 26 Jul 2012, accepted on 19 Dec 2012 and first published on 17 Jan 2013


Article type: Paper
DOI: 10.1039/C2SM26727F
Citation: Soft Matter, 2013,9, 2603-2613
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    Computer simulations of colloidal particles under flow in microfluidic channels

    A. Nikoubashman, C. N. Likos and G. Kahl, Soft Matter, 2013, 9, 2603
    DOI: 10.1039/C2SM26727F

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