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Estimations de champs de diffusivités, de vitesses et de sources de chaleur par thermographie infrarouge sur des systèmes microfluidiques.

Abstract : Microfluidics is a recent technology which one of the main advantages is the miniaturization of the studied phenomena, in any domain (energy, chemistry, biology...). However, measurement techniques (velocity, temperature...) inside microfluidic systems are often difficult to implement. This is why it is important to design a new and efficient measurement tool, adapted to those micro-scales. InfraRed Thermography (IRT) is a powerful mean to measure temperature fields, which can be utilized to estimate thermo-physical properties. The first objective of this work is to develop a set of experimental and numerical methods coupling IRT and microfluidics in order to estimate thermal and fluid flow parameters. Original experimental procedures as well as one parameter inverse methods have been developed. All the developed methods were tested and validated from simulated temperature fields. Experimental measurements permitted to map and quantitatively estimate parameters like velocity, thermal diffusivity and source terms. The second objective is to test the developed methods on real microfluidics applications. Those tests led to excellent results such as chemical reaction enthalpy measurement in micro-reactor, and also the study of water crystallization in micro-channels.
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Contributor : Christophe Ravey <>
Submitted on : Wednesday, March 14, 2012 - 10:30:15 PM
Last modification on : Thursday, January 11, 2018 - 6:20:34 AM
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Christophe Ravey. Estimations de champs de diffusivités, de vitesses et de sources de chaleur par thermographie infrarouge sur des systèmes microfluidiques.. Génie des procédés. Arts et Métiers ParisTech, 2011. Français. ⟨NNT : 2011ENAM0045⟩. ⟨pastel-00679165⟩

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