Ghent University Academic Bibliography

Advanced

Heat, air and moisture transport modelling in ventilated cavity walls

Marnix Van Belleghem UGent, Marijke Steeman UGent, Arnold Janssens UGent and Michel De Paepe UGent (2015) JOURNAL OF BUILDING PHYSICS. 38(4). p.317-349
abstract
Cavity walls are a widely used external wall type in north-western Europe with a good moisture tolerance in cool humid climates. In this work, a cavity wall configuration with a brick veneer outside leaf and a wood fibre board inside leaf is analysed with a newly developed coupled computational fluid dynamics-heat, air and moisture model. Drying of the outside or inside cavity leaf, both for summer and winter conditions was analysed. The new model was compared with a widely used simulation tool for building envelope analysis (WUFI (R)) that uses a simplified modelling approach for the convection in the cavity. The study showed that the simplified model overestimated the drying and moistening rates of the cavity wall compared to the detailed model. For both models the drying of the outer leaf was mainly determined by the outside conditions, and the outside leaf dried out mainly to the outside and not to the cavity. For the inside leaf, however the cavity ventilation was of major importance in drying. The study revealed that the simplified model could not be used to evaluate the drying potential of a ventilated cavity because it overestimated the ventilation effect systematically. The simplified model would in such case indicate lower moisture contents than in reality and consequently lower risk for mould growth, wood rot or other structural damage. Only detailed modelling of the convection in the cavity, as in the new model, leads to a correct evaluation of ventilated cavity walls.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
drying, computational fluid dynamics, moisture transfer, air, cavity wall, heat, POROUS MATERIALS, SIMULATION
journal title
JOURNAL OF BUILDING PHYSICS
volume
38
issue
4
pages
317 - 349
publisher
Sage
Web of Science type
Article
Web of Science id
000346994900003
JCR category
CONSTRUCTION & BUILDING TECHNOLOGY
JCR impact factor
1 (2015)
JCR rank
30/61 (2015)
JCR quartile
2 (2015)
ISSN
1744-2591
DOI
10.1177/1744259114543984
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
5793138
handle
http://hdl.handle.net/1854/LU-5793138
date created
2015-01-05 09:22:20
date last changed
2016-12-19 15:41:53
@article{5793138,
  abstract     = {Cavity walls are a widely used external wall type in north-western Europe with a good moisture tolerance in cool humid climates. In this work, a cavity wall configuration with a brick veneer outside leaf and a wood fibre board inside leaf is analysed with a newly developed coupled computational fluid dynamics-heat, air and moisture model. Drying of the outside or inside cavity leaf, both for summer and winter conditions was analysed. The new model was compared with a widely used simulation tool for building envelope analysis (WUFI (R)) that uses a simplified modelling approach for the convection in the cavity. The study showed that the simplified model overestimated the drying and moistening rates of the cavity wall compared to the detailed model. For both models the drying of the outer leaf was mainly determined by the outside conditions, and the outside leaf dried out mainly to the outside and not to the cavity. For the inside leaf, however the cavity ventilation was of major importance in drying. The study revealed that the simplified model could not be used to evaluate the drying potential of a ventilated cavity because it overestimated the ventilation effect systematically. The simplified model would in such case indicate lower moisture contents than in reality and consequently lower risk for mould growth, wood rot or other structural damage. Only detailed modelling of the convection in the cavity, as in the new model, leads to a correct evaluation of ventilated cavity walls.},
  author       = {Van Belleghem, Marnix and Steeman, Marijke and Janssens, Arnold and De Paepe, Michel},
  issn         = {1744-2591},
  journal      = {JOURNAL OF BUILDING PHYSICS},
  keyword      = {drying,computational fluid dynamics,moisture transfer,air,cavity wall,heat,POROUS MATERIALS,SIMULATION},
  language     = {eng},
  number       = {4},
  pages        = {317--349},
  publisher    = {Sage},
  title        = {Heat, air and moisture transport modelling in ventilated cavity walls},
  url          = {http://dx.doi.org/10.1177/1744259114543984},
  volume       = {38},
  year         = {2015},
}

Chicago
Van Belleghem, Marnix, Marijke Steeman, Arnold Janssens, and Michel De Paepe. 2015. “Heat, Air and Moisture Transport Modelling in Ventilated Cavity Walls.” Journal of Building Physics 38 (4): 317–349.
APA
Van Belleghem, M., Steeman, M., Janssens, A., & De Paepe, M. (2015). Heat, air and moisture transport modelling in ventilated cavity walls. JOURNAL OF BUILDING PHYSICS, 38(4), 317–349.
Vancouver
1.
Van Belleghem M, Steeman M, Janssens A, De Paepe M. Heat, air and moisture transport modelling in ventilated cavity walls. JOURNAL OF BUILDING PHYSICS. Sage; 2015;38(4):317–49.
MLA
Van Belleghem, Marnix, Marijke Steeman, Arnold Janssens, et al. “Heat, Air and Moisture Transport Modelling in Ventilated Cavity Walls.” JOURNAL OF BUILDING PHYSICS 38.4 (2015): 317–349. Print.