Microfluidics and Nanofluidics

, Volume 3, Issue 6, pp 635–644 | Cite as

Electrostatic force calculation for an EWOD-actuated droplet

Research Paper


This paper examines the electrostatic force on a microdroplet transported via electrowetting on dielectric (EWOD). In contrast with previous publications, this article details the force distribution on the advancing and receding fluid faces, in addition to presenting simple algebraic formulae for the net force in terms of system parameters. Dependence of the force distribution and its integral on system geometry, droplet location, and material properties is described. The consequences of these theoretically and numerically obtained results for design and fabrication of EWOD devices are considered.


Electrowetting on dielectric (EWOD) Digital microfluidics Contact angle saturation 



The authors would like to acknowledge partial funding under AFOSR Contract No. FA9550-05-1-0334 and NSF Contract No. CTS-05-40004 to K.M.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.University of Colorado at BoulderBoulderUSA

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