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Modélisation de la microstructuration dans les polymères chargés. Application à la mise en forme.

Abstract : This document deal with the possibility to perform a simulation of a complex fluid flow (short fibres suspension, viscoelastic flow, short fibres reinforced polymer) taking into account the microstructural state in the kinetic theory background. There is a strong coupling effect between the microstructural state and the kinematics at the macroscopic scale. Classical deterministic approaches fail to solve the Fokker-Planck equation describing the fluid microstructure because of the high degree of freedom involved. To overcome this difficulty, this work present and test some techniques of dimensional reduction.

These methods are applied to recirculating flows. The recirculation add a difficulty because nor initial conditions nor boundary conditions are known. And some recirculating areas appear in many industrial flows during the materials forming. That is why we have developed some numerical methods dealing with these kinds of flows.

Finally, a part of this work is dedicated to an experimental study allowing to validate the numerical results and to focus on some physical phenomenons that occur during the material forming.
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https://tel.archives-ouvertes.fr/tel-00265341
Contributor : Etienne Pruliere <>
Submitted on : Tuesday, March 18, 2008 - 10:59:06 PM
Last modification on : Friday, November 6, 2020 - 3:54:03 AM
Long-term archiving on: : Friday, May 21, 2010 - 12:40:40 AM

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  • HAL Id : tel-00265341, version 1

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Etienne Pruliere. Modélisation de la microstructuration dans les polymères chargés. Application à la mise en forme.. Sciences de l'ingénieur [physics]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00265341⟩

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