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Characterization and modeling of unsaturated water liquid transport in softwoods

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Characterization and modeling of unsaturated water liquid transport in softwoods

Candanedo Ibarra, Luis Miguel (2005) Characterization and modeling of unsaturated water liquid transport in softwoods. Masters thesis, Concordia University.

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Abstract

Moisture sources in the building envelope are, in order of magnitude: rain penetration, moisture brought through air movement and moisture diffusion. As rain water impinges onto the wall and runs off the surface, water may seep into cracks and accumulate within the wood frame structure. Water can move by capillary action into wood-based components and the water vapor can also be diffusing through the structure. In the hygroscopic range, the theory has evolved considerably, and by the use of sorption curves, it is possible to explain the absorption of water in the vapor phase for a range of relative humidity (from 0 to 95% RH). However, liquid mass diffusivities of water for many Canadian wood species have not yet been investigated. The main objectives of this study are to quantify averaged values of diffusivities for a specific type of wood (jack pine), and to develop a transient modeling approach for liquid-phase water transport in wood considering the orthotropic effect of the wood structure and compare it to experimental results.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (Masters)
Authors:Candanedo Ibarra, Luis Miguel
Pagination: xvii, 133 leaves : ill. (some col.) ; 29 cm.
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Building, Civil and Environmental Engineering
Date:2005
Thesis Supervisor(s):Derome, Dominique
ID Code:8616
Deposited By:Concordia University Libraries
Deposited On:18 Aug 2011 14:30
Last Modified:18 Aug 2011 14:30
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