A Numerical Analysis Technique to Evaluate the Moisture-Dependent Diffusion Coefficient on Moisture Movement During Drying

Yong Chen, Elvin T. Choong, David M. Wetzel


The conventional method of determining the diffusion coefficient of wood as a function of moisture content is based largely on the moisture content profile data using a slicing technique. This method is destructive and subject to inherent error because it uses average moisture content values and different samples at various drying times. This paper describes an alternative nondestructive approach using a numerical technique to evaluate the moisture-dependent diffusion coefficient using drying curves. It gives an accurate prediction of moisture movement through the entire drying process.


Numerical analysis;diffusion coefficient;drying;fiber saturation point

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