Disordered monodisperse 3D open-cell foams: Elasticity, Thermal conductivity and Permeability

Abstract : This work is devoted to the modeling of the overall properties of 3D disordered monodisperse open cell foams manufactured by solidification of liquid foams. First, we develop a new and flexible meshing procedure to generate Representative Volume Elements (RVE) of disordered wet foam. We consider solid foam RVEs arising from solidifi-cation of the liquid Plateau border with wide range of volume fraction varying from 2.5% to 20%. Effective properties of foams such as elasticity, thermal conductivity and permeability are determined by averaging the solution of boundary value problems set on the RVE. The local problems are discretized and solved by the finite element method. We evaluate the accuracy of the resultant estimates, with respect to the size of the RVEs, by conducting a periodic study on a Kelvin's foam structure. In order to validate our foam numerical model, we compare results for the overall elasticity to the estimates of Gibson and Ashby, and results for the overall permeability to classical Kozeny-Carman equations, leading to good agreement. Finally, we propose new closed form estimates for both the elastic modulus and the thermal conductivity.
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Pré-publication, Document de travail
2017
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Contributeur : Xavier Chateau <>
Soumis le : lundi 11 décembre 2017 - 12:05:10
Dernière modification le : jeudi 11 janvier 2018 - 06:25:23

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  • HAL Id : hal-01660715, version 1

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Christelle Lusso, Xavier Chateau. Disordered monodisperse 3D open-cell foams: Elasticity, Thermal conductivity and Permeability. 2017. 〈hal-01660715〉

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