SPH BASED OPTIMIZATION OF ELECTROWETTING-DRIVEN DIGITAL MICROFLUIDICS WITH ADVANCED ACTUATION PATTERNS

WEIß Dennis (), Andreas Greiner (), Jan Lienemann () and Jan G. Korvink ()
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WEIß Dennis: Institute for Microsystems Engineering (IMTEK), University of Freiburg, 79110 Freiburg, Germany
Andreas Greiner: Institute for Microsystems Engineering (IMTEK), University of Freiburg, 79110 Freiburg, Germany
Jan Lienemann: Institute for Microsystems Engineering (IMTEK), University of Freiburg, 79110 Freiburg, Germany;
Jan G. Korvink: Institute for Microsystems Engineering (IMTEK), University of Freiburg, 79110 Freiburg, Germany;

International Journal of Modern Physics C (IJMPC), 2013, vol. 24, issue 12, 1-7

Abstract: Fast and thorough mixing is a crucial operation of digital microfluidic devices, where discrete and small fluid portions are moved and processed. In this paper, we want to analyze and to optimize the mixing process by substituting conventional motion and superposing oscillatory and translational modes. An accurate multiphase smoothed particle hydrodynamics (SPH) discretization for incompressible flow is instantiated. Different harmonic excitation patterns for the solid–liquid surface energy are applied and their influence on droplet mode shapes, formation of eddies and the Shannon entropy of droplet fluid components are measured. We tailor enhanced actuation patterns which improve mixing grade and reduce mixing time.

Keywords: Smoothed particle hydrodynamics; oscillating droplet; shape modes; mixing efficiency; mixing optimization; mixing eddies; Shannon entropy; electrowetting; 47.51.+a; 47.55.dd; 47.55.np; 47.61.Jd (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0129183113400123

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