Authors : Abdallah Zerroug , Khaled Zehar and Larbi Refoufi
Abstract: The thermal conductivity theory for porous materials has been treated. Study of previous researchers has been discussed. The estimation of the thermal conductivity of porous material on a basis of a topological network obtained by image analysis techniques seems to be more accurate than the general model for conduction in a multiphase media proposed by Reynolds and Hough for the dielectric constants of mixtures and its thermal equivalent given by A. Simpson and Audry. Stuckes. The reason is that the Reynolds and Hough model supposed that the shape of the pores are spherical or disc shaped, while in the estimation of the thermal conductivity by image analysis, the method traits the real shape of the pores. Similar study done on the effects of bubbles on the hydraulic conductivity presented by Hunt and Manga, where they presented a model based on a single bubble dynamics to develop a model for a motion of fluid through a porous material.
Abdallah Zerroug , Khaled Zehar and Larbi Refoufi , 2007. Thermal Conductivity Models of Porous Materials . Journal of Engineering and Applied Sciences, 2: 722-727.