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Simulation et modélisation multiéchelles de la rhéologie des mousses 2D

Abstract : We show how macroscopic flow, slow viscoelastic dynamics and rheological memory of 2D liquid foams are related to processes at the film scale and how these are coupled to aging phenomena.
The first main topic that we have studied is the coupling between local, mesoscopic and macroscopic length scales. We present a new law relating the stretching of individual films in response to a macroscopic strain. This relationship allows the elasticity of 2D foams to be modelled as function of the microstructure. Moreover, we discuss how macroscopic flow results from bubble rearrangements that can be represented as force dipoles acting within an elastic continuous medium.
The second main topic concerns is the coupling between rheology and aging. Using the dipole picture, we establish an analytic expression of the strain due to rearrangements induced by aging. On this basis, we formulate a constitutive rheological model considering intrinsic aging dynamics as well as topological and geometrical constraints.
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Contributor : Sébastien Vincent-Bonnieu <>
Submitted on : Tuesday, July 24, 2007 - 6:31:07 PM
Last modification on : Wednesday, February 26, 2020 - 7:06:03 PM
Long-term archiving on: : Thursday, April 8, 2010 - 11:57:36 PM


  • HAL Id : tel-00165161, version 1



Sébastien Vincent-Bonnieu. Simulation et modélisation multiéchelles de la rhéologie des mousses 2D. Analyse de données, Statistiques et Probabilités []. Université de Marne la Vallée, 2006. Français. ⟨tel-00165161⟩



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