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Ecoulements de fluides viscoélastiques en géométries confinées : application à la récupération assistée des hydrocarbures

Abstract : The flow of complex fluids in confined geometries is an issue of interest notably in the field of oil recovery. In this work, the fluids are polymer solutions of high molecular weight and surfactant solutions enable to form wormlike micelles. We study the flow in microfluidic devices made-up with Su-8 resin following a protocol that has been set during this PhD. We carried out experiences of oil drainage in porous media and show that shear-thinning and slippage are propoting the fingering during the invasion. our experiences also show that these solutions can be turbulent at low reynods numbers. These instabilities have consequences on the local rheology in a simple straight channel and are source of additional dissipation in more complex geometries.
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Julien Beaumont. Ecoulements de fluides viscoélastiques en géométries confinées : application à la récupération assistée des hydrocarbures. Autre [cond-mat.other]. Université Sciences et Technologies - Bordeaux I, 2013. Français. ⟨NNT : 2013BOR14879⟩. ⟨tel-00998545⟩

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