Nano Science and Technology Institute
Nanotech 2009 Vol. 3
Nanotech 2009 Vol. 3
Nanotechnology 2009: Biofuels, Renewable Energy, Coatings, Fluidics and Compact Modeling
Chapter 5: Modeling and Simulation of Micro and Nano Systems

Determination of droplet shape in digital microfluidic systems using two-dimensional flow analysis

Authors:A. Ahmadi, H. Najjaran, J.F. Holzman, M. Hoorfar
Affilation:University of British Columbia Okanagan, CA
Pages:351 - 354
Keywords:digital microfluidics, microdroplet, modeling, contact angle
Abstract:A two-dimensional model for fluid flow in a digital microfluidic system is introduced, and the results are compared to experimental data. Resistive flow effects based upon contact line forces, filler effects and shear forces are applied in the model. It is found that the induced vertical velocity components are critical to the overall motion, as velocity and pressure gradients, together with microdroplet surface deformations, can limit the desired horizontal velocity. These effects are particularly important for digital microfluidic systems characterized by higher Reynolds numbers.
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