Modeling the kinetics of moisture adsorption by wood

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

• Publisher: Springer
• Year: 1988
• Tongue: English
• Weight: 444 KB
• Volume: 22
• Category: Article
• ISSN: 0043-7719
• DOI: 10.1007/bf00353224

✦ Synopsis

Modeling of the kinetic of moisture adsorption by wood has been studied by using cubic samples. The model is based on an explicit numerical method with finite differences. Experiments have been carried out either for determining the data necessary for calculations (diffusivity, amount adsorbed at equilibrium) and for testing the validity of the model. Two different experiments have been done in case of the longitudinal adsorption: the one by increasing the relative humidity of the atmosphere following a discontinuous step by step process. The other by determining the kinetic adsorption of moisture by samples previously equilibrated under the same conditions when they are contacted with atmosphere at various R. H. Good correlations are obtained between calculated values and experiments in both cases. Although the actual paper is concerned with constant diffusivity, the model is capable to use concentration-dependent diffusivities.