Periodic homogenization for heat,air, and moisture transfer of porous building materials |
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Authors: | Fares Bennai Kamilia Abahri Abdelkader Tahakourt |
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Affiliation: | 1. Laboratoire de Génie de la Construction et Architecture (LGCA), Faculté de Technologie, Université de Bejaia, Bejaia, Algérie;2. LaSIE, UMR 7356 CNRS Université de La Rochelle, La Rochelle Cedex 1, France;3. LMT-Cachan/ENS Cachan/CNRS/Université Paris Saclay, Cachan, France |
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Abstract: | ABSTRACTIn this work, a macroscopic model of hygrothermal transfers in porous building materials was developed, using periodic homogenization, where the air infiltration was added to the classical mass and energy balance equations written at the microscopic scale. The corresponding infiltration, hygric, and thermal input parameters were carefully identified. Numerical calculations of thermal and diffusion tensors were performed on a representative concrete elementary cell. Further, the diffusion tensor was compared to the equivalent experimental results available in the literature, and its sensitivity to the water content variations and porosity has been evaluated on the concerned elementary cell. |
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