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<dc:title xml:lang="en">Flow behavior in wall-less liquid tubes</dc:title>
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<dc:subject xml:lang="fr">Chimie de l'écoulement</dc:subject>
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<dcterms:abstract xml:lang="fr">Cette thèse, intitulée "Flow behavior in wall-less liquid tubes", donne un aperçu général des possibilités de surmonter les défis présentés par la micro fluidique en utilisant la technologie des tubes liquides sans paroi, développée dans notre laboratoire. L'objectif final est de déterminer si le fait d'éviter les parois solides dans les micro canaux peut avoir un impact sur la friction, le mélange et le blocage. Nos études montrent que l'absence de parois solides influence les profils d'écoulement dans les micro canaux, permettant d'obtenir des écoulements rotatifs même à un faible nombre de Reynolds. De plus, nous constatons que les tubes liquides confinés magnétiquement peuvent avoir un impact important sur la chimie de l'écoulement. Les réactions impliquant des particules solides sont réalisées avec un rendement de conversion élevé et un polymère réticulé est obtenu en écoulement sans colmatage. Ces résultats sont présentés comme une solution prometteuse aux défis restants dans le domaine de la micro fluidique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis, entitled “Flow behavior in wall-less liquid tubes”, provides a general overview over the possibilities to overcome the challenges presented in microfluidic by using wall-less liquid tubes technology, developed in our laboratory. The final goal is to identify whether avoiding solid wall in microchannels can have an impact in friction, mixing and clogging. Our studies show that the absence of solid walls influences the flow profiles in microchannels, allowing to achieve rotating flows even a low Reynolds number. Moreover, we find that magnetically confined liquid tubes can have a strong impact in flow chemistry. Reactions involving solid particles are run with a high conversion yield and a cross-linked polymer is obtained in flow without clogging. This results are shown as a promising solution to the remain challenges in the field of microfluidics.</dcterms:abstract>
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