Next Article in Journal
Effective Permittivity for FDTD Calculation of Plasmonic Materials
Next Article in Special Issue
Integrated Thermal and Microcoriolis Flow Sensing System with a Dynamic Flow Range of More Than Five Decades
Previous Article in Journal
A Flexible Capacitive Sensor with Encapsulated Liquids as Dielectrics
Previous Article in Special Issue
Displacement Pumping of Liquids Radially Inward on Centrifugal Microfluidic Platforms in Motion
Article Menu

Export Article

Open AccessArticle
Micromachines 2012, 3(1), 150-167;

Modeling and Control of Electrowetting Induced Droplet Motion

IMEC, Kapeldreef 75, B3001 Leuven, Belgium
Department of Mechanical Engineering, KULeuven, Celestijnenlaan 300A, B-3001 Leuven, Belgium
Author to whom correspondence should be addressed.
Received: 1 February 2012 / Revised: 2 March 2012 / Accepted: 12 March 2012 / Published: 14 March 2012
(This article belongs to the Special Issue Micro Flow Controllers)
Full-Text   |   PDF [781 KB, uploaded 14 March 2012]   |  


In this paper, a general methodology for the dynamic study of electrostatically actuated droplets is presented. A simplified 1D transient model is developed to investigate the transient response of a droplet to an actuation voltage and to study the effect of geometrical and fluid-thermal properties and electrical parameters on this behavior. First, the general approach for the dynamic droplet motion model is described. All forces acting on the droplet are introduced and presented in a simplified algebraic expression. For the retentive force, the empirically extracted correlations are used, and for the electrostatic actuation force, results from electrostatic finite element simulations are used. The dynamic model is applied to electrowetting induced droplet motion between parallel plates in the case of a single actuation electrode and for an array of electrodes. Using this methodology, the influence of the switching frequency and actuation voltage is studied. Furthermore, a linearized equivalent damped mass—spring model is presented to approximate the dynamic droplet motion. It is shown that the optimal switching frequency can be estimated by twice the natural frequency of the linearized damped mass—spring system. View Full-Text
Keywords: electrowetting; electrostatic droplet actuation; flow control electrowetting; electrostatic droplet actuation; flow control

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Oprins, H.; Vandevelde, B.; Baelmans, M. Modeling and Control of Electrowetting Induced Droplet Motion. Micromachines 2012, 3, 150-167.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Micromachines EISSN 2072-666X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top