Experimental and Theoretical Investigation of Nonisothermal Transfer in Hygroscopic Building Materials

Abstract : In this paper a modified two-dimensional Luikov model for evaluating the non-isothermal moisture migration in porous building materials was proposed. The coupled heat and moisture transfer problem was modeled. Vapor content and temperature were chosen as the principal driving potentials. The coupled equations were solved by a numerical method, which consists of a finite difference technique with a fully implicit scheme in time. Two validation experiments were developed in this study. The evolution of transient moisture distributions in both one-dimensional and two-dimensional cases was measured. A comparison between experimental results and those obtained by the numerical model proves that they are fully consistent with each other. The modified model can be integrated into a whole building heat, air and moisture transfer model.
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Article dans une revue
Building and Environment, Elsevier, 2008, 43 (12), pp.2154- 2162
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https://hal.archives-ouvertes.fr/hal-00395093
Contributeur : Rafik Belarbi <>
Soumis le : dimanche 14 juin 2009 - 19:41:07
Dernière modification le : jeudi 9 février 2017 - 16:58:58

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  • HAL Id : hal-00395093, version 1

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Rafik Belarbi, Menghao Qin, Abdelkarim Aît-Mokhtar, Nilsson Lars Olof. Experimental and Theoretical Investigation of Nonisothermal Transfer in Hygroscopic Building Materials. Building and Environment, Elsevier, 2008, 43 (12), pp.2154- 2162. 〈hal-00395093〉

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