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Experimental and theoretical investigation of non-isothermal transfer in hygroscopic building materials

Belarbi, Rafik; Qin, Menghao LU ; Ait-Mokhtar, Abdelkarim and Nilsson, Lars-Olof LU (2008) In Building and Environment 43(12). p.2154-2162
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 wits measured. A comparison between experimental results and those obtained by the numerical model proves that they are fully consistent with each other. The... (More)
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 wits 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. (C) 2007 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Building materials, Experiments, Coupled heat and moisture transfer, Two-dimensional numerical modeling
in
Building and Environment
volume
43
issue
12
pages
2154 - 2162
publisher
Elsevier
external identifiers
  • wos:000259919300015
  • scopus:49349107968
ISSN
1873-684X
DOI
10.1016/j.buildenv.2007.12.014
language
English
LU publication?
yes
id
798156e6-ce86-43e1-aa42-caf02447ca89 (old id 1285860)
date added to LUP
2009-02-06 09:05:47
date last changed
2017-08-06 04:07:38
@article{798156e6-ce86-43e1-aa42-caf02447ca89,
  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 wits 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. (C) 2007 Elsevier Ltd. All rights reserved.},
  author       = {Belarbi, Rafik and Qin, Menghao and Ait-Mokhtar, Abdelkarim and Nilsson, Lars-Olof},
  issn         = {1873-684X},
  keyword      = {Building materials,Experiments,Coupled heat and moisture transfer,Two-dimensional numerical modeling},
  language     = {eng},
  number       = {12},
  pages        = {2154--2162},
  publisher    = {Elsevier},
  series       = {Building and Environment},
  title        = {Experimental and theoretical investigation of non-isothermal transfer in hygroscopic building materials},
  url          = {http://dx.doi.org/10.1016/j.buildenv.2007.12.014},
  volume       = {43},
  year         = {2008},
}