English多孔材料导热系数计算.pdf

Computational Materials Science 97 (2015) 148–158 Contents lists available at ScienceDirect Computational Materials Science journal homepage: www.elsevier .com/locate/commatsci Computational thermal conductivity in porous materials using homogenization techniques: Numerical and statistical approaches A. El Moumen a,b, T. Kanit a, A. Imad a,⇑, H. El Minor b a Laboratoire de Mécanique de Lille, LML, CNRS/UMR 8107, Université Lille Nord de France, Cité Scientifique, 59655 Villeneuve d’Ascq, France b Laboratoire de Mécanique des Procédés de l’Energie et de l’Environnement, MPEE, Université Ibn Zohr, Agadir, Morocco a r t i c l e i n f o a b s t r a c t Article history: In this paper, the numerical homogenization technique and morphological analysis are used in order to Received 20 February 2014 compute the thermal conductivity in microscale of porous materials. The computational thermal Received in revised form 12 September homogenization is based on a 3D random material with spherical and ellipsoidal pores. Two types of 2014 microstructures are considered: microstructure 1 with random distribution of identical non overlapping Accepted 26 September 2014 Available online 6 November 2014 pores and microstructure 2 with overlapping pores, based on the boolean model. The objective is to quantify the difference between these morphologies, in order to find some relationships between their morphological