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Modelling the absorption and desorption of moisture by wood in an atmosphere of constant and programmed relative humidity

✍ Scribed by A. Droin-Josserand; J. L. Taverdet; J. M. Vergnaud

Publisher: Springer
Year: 1988
Tongue: English
Weight: 470 KB
Volume: 22
Category: Article
ISSN: 0043-7719
DOI: 10.1007/bf00353320

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✦ Synopsis

A mathematical model based on numerical method with finite differences is able to describe the process of absorption and desorption by wood contacted with various atmospheres. The relative humidity of the atmosphere can either be kept constant or varied with a constant rate, at the same temperature of 30~ The transverse transport of moisture is controlled by transient diffusion with a concentration-dependent diffusivity. The model takes this fact into account, as well as the dependence of the moisture content at equilibrium with the relative humidity. Not only the model gives kinetics in good agreement with experiments, but also it is able to attain the profiles of concentration of moisture developed throughout the wood.

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