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Effective heat conductivities of partly infiltrated fibrous media

dc.contributor.authorAHMADI-SENICHAULT, Azita
hal.structure.identifierLaboratoire des Composites Thermostructuraux [LCTS]
dc.contributor.authorVIGNOLES, Gerard
hal.structure.identifierLaboratoire des Composites Thermostructuraux [LCTS]
dc.contributor.authorCOINDREAU, Olivia
hal.structure.identifierLaboratoire des Composites Thermostructuraux [LCTS]
dc.contributor.authorROS, William
dc.contributor.authorCOULARD DIAS, Fagner
dc.date.accessioned2021-05-14T09:55:53Z
dc.date.available2021-05-14T09:55:53Z
dc.date.conference2009-03-11
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/77747
dc.description.abstractEnThe present work has been motivated by the context of feeding a global model of thermal-gradient chemical vapour infiltration process for the fabrication of fibre-reinforced ceramic matrix composites: the heat conductivity has to be known in the material as a function of the pore volume distribution, at different stages of infiltration. Since the composite preform is made of woven fibres, the medium is highly anisotropic: the heat conductivity has a tensorial character which has to be retrieved. We propose an approach based on a double up-scaling. First, the fibre-scale effective longitudinal and transverse conductivities are computed for several volume fractions of matrix and fibres, using a periodic unit cell as a computational domain. The second change of scale takes precisely into account the actual architecture of the composite thanks to 3D X-ray tomographic imaging. The 3D blocks are processed in order to retrieve the local orientation of the fibres in various sub-domains; the local heat conductivities are then affected to the sub-domains, and a volume averaging procedure is applied for the determination of the global effective conductivity.Several application examples are presented and discussed.
dc.language.isoen
dc.subject.enFibrous media
dc.subject.enUpscaling
dc.subject.enHeat conductivity
dc.title.enEffective heat conductivities of partly infiltrated fibrous media
dc.typeCommunication dans un congrès avec actes
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Thermique [physics.class-ph]
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.countryDE
bordeaux.title.proceeding1st International Conference on Challenges of Porous Media
bordeaux.conference.cityKaiserslautern
bordeaux.peerReviewedoui
hal.identifierhal-01196744
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01196744v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=AHMADI-SENICHAULT,%20Azita&VIGNOLES,%20Gerard&COINDREAU,%20Olivia&ROS,%20William&COULARD%20DIAS,%20Fagner&rft.genre=proceeding


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