Microsystem Technologies

, Volume 18, Issue 4, pp 523–530

Insight into the micro scale dynamics of a micro fluidic wetting-based conveying system by particle based simulation

  • Jan Lienemann
  • Dennis Weiß
  • Andreas Greiner
  • David Kauzlaric
  • Oliver Grünert
  • Jan G. Korvink
Technical Paper

Abstract

We simulate a microfluidic conveying system using the many-body dissipative particle dynamics method (MDPD). The conveying system can transport micro parts to a specified spot on a surface by letting them float inside or on top of a droplet, which is pumped by changing the wetting behaviour of the substrate, e.g., with electrowetting on dielectrics. Subsequent evaporation removes the fluid; the micro part remains on its final position, where a second substrate can pick it up. In this way, the wetting control can be separate from the final device substrate. The MDPD method represents a fluid by particles, which are interpreted as a coarse graining of the fluid’s molecules. The choice of interaction forces allows for free surfaces. To introduce a contact angle model, non-moving particles beyond the substrate interact with the fluid particles by MDPD forces such that the required contact angle emerges. The micro part is simulated by particles with spring-type interaction forces.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Jan Lienemann
    • 1
    • 3
  • Dennis Weiß
    • 1
  • Andreas Greiner
    • 1
  • David Kauzlaric
    • 2
  • Oliver Grünert
    • 1
  • Jan G. Korvink
    • 1
    • 2
  1. 1.Department of Microsystems Engineering (IMTEK)University of FreiburgFreiburgGermany
  2. 2.Freiburg Institute for Advanced Studies (FRIAS)University of FreiburgFreiburgGermany
  3. 3.Schmidt and Partner Engineering AG (SPEAG)ZürichSwitzerland

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