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Coupled heat and moisture transfer in multi-layer building materials

Qin, Menghao; Belarbi, Rafik; Ait-Mokhtar, Abdelkarim and Nilsson, Lars-Olof LU (2009) In Construction and Building Materials 23(2). p.967-975
Abstract
A dynamic mathematical model for simulating the coupled heat and moisture migration through multilayer porous building materials was proposed. Vapor content and temperature were chosen as the principal driving potentials. The discretization of the governing equations was done by the finite difference approach. A new experimental set-up was also developed in this study. The evolution of transient temperature and moisture distributions inside specimens were measured. The method for determining the temperature gradient coefficient was also presented. The moisture diffusion coefficient, temperature gradient coefficient, sorption-desorption isotherms were experimentally evaluated for some building materials (sandstone and lime-cement mortar).... (More)
A dynamic mathematical model for simulating the coupled heat and moisture migration through multilayer porous building materials was proposed. Vapor content and temperature were chosen as the principal driving potentials. The discretization of the governing equations was done by the finite difference approach. A new experimental set-up was also developed in this study. The evolution of transient temperature and moisture distributions inside specimens were measured. The method for determining the temperature gradient coefficient was also presented. The moisture diffusion coefficient, temperature gradient coefficient, sorption-desorption isotherms were experimentally evaluated for some building materials (sandstone and lime-cement mortar). The model was validated by comparing with the experimental data with good agreement. Another advantage of the method lies in the fact that the required transport properties for predicting the non-isothermal moisture flow only contain the vapor diffusion coefficient and temperature gradient coefficient. They are relatively simple, and can be easily determined. (C) 2008 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
Experiments, Building materials, Coupled heat and moisture transfer, Modeling
in
Construction and Building Materials
volume
23
issue
2
pages
967 - 975
publisher
Elsevier
external identifiers
  • wos:000261779300043
  • scopus:54849441223
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2008.05.015
language
English
LU publication?
yes
id
34a8feaa-9b56-450f-bc34-18cfebe5b091 (old id 1313823)
date added to LUP
2009-03-06 14:53:12
date last changed
2017-07-02 03:53:44
@article{34a8feaa-9b56-450f-bc34-18cfebe5b091,
  abstract     = {A dynamic mathematical model for simulating the coupled heat and moisture migration through multilayer porous building materials was proposed. Vapor content and temperature were chosen as the principal driving potentials. The discretization of the governing equations was done by the finite difference approach. A new experimental set-up was also developed in this study. The evolution of transient temperature and moisture distributions inside specimens were measured. The method for determining the temperature gradient coefficient was also presented. The moisture diffusion coefficient, temperature gradient coefficient, sorption-desorption isotherms were experimentally evaluated for some building materials (sandstone and lime-cement mortar). The model was validated by comparing with the experimental data with good agreement. Another advantage of the method lies in the fact that the required transport properties for predicting the non-isothermal moisture flow only contain the vapor diffusion coefficient and temperature gradient coefficient. They are relatively simple, and can be easily determined. (C) 2008 Elsevier Ltd. All rights reserved.},
  author       = {Qin, Menghao and Belarbi, Rafik and Ait-Mokhtar, Abdelkarim and Nilsson, Lars-Olof},
  issn         = {0950-0618},
  keyword      = {Experiments,Building materials,Coupled heat and moisture transfer,Modeling},
  language     = {eng},
  number       = {2},
  pages        = {967--975},
  publisher    = {Elsevier},
  series       = {Construction and Building Materials},
  title        = {Coupled heat and moisture transfer in multi-layer building materials},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2008.05.015},
  volume       = {23},
  year         = {2009},
}