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Theses

Gouttes et champs électriques dans un système microfluidique

Abstract : The thesis offers novel analyses of the breakup phenomenon at microfluidic junctions, along with new insights into the effect of electric fields on droplets in microfluidic channels.
The first part studies droplet behaviour as they arrive at a microfludic junction. Three scenarios - two of them leading to breakup - are identified. We study them quantitatively using
local variables and control parameters. The results of this study lead to a design of a microfluidic phase extractor.
In the second part, we analyse the effect of the electric field on a confined droplet. We develop a 2D theoretical approach of the problem using Shankar’s work. Then, we compare these theo-
retical results with two experiments : we show that the theory successfully predicts the shape of confined droplets under electric fieldalong with the change in velocity as the droplet moves along a non-uniform field. The results are applied to propose novel ways of controling droplets.
in microfluidic systems.
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https://tel.archives-ouvertes.fr/tel-00287107
Contributor : Laure Ménétrier-Deremble <>
Submitted on : Tuesday, June 10, 2008 - 9:02:47 PM
Last modification on : Wednesday, December 9, 2020 - 3:12:37 PM
Long-term archiving on: : Friday, May 28, 2010 - 7:43:48 PM

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  • HAL Id : tel-00287107, version 1

Citation

Laure Ménétrier-Deremble. Gouttes et champs électriques dans un système microfluidique. Dynamique des Fluides [physics.flu-dyn]. Université Pierre et Marie Curie - Paris VI, 2007. Français. ⟨tel-00287107⟩

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