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Local water vapor diffusion coefficient when drying Norway spruce sapwood
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-0145-080X
2006 (English)In: Journal of Wood Science, ISSN 1435-0211, E-ISSN 1611-4663, Vol. 52, no 3, p. 195-201Article in journal (Refereed) Published
Abstract [en]

In this article, a one-dimensional and a two-dimensional approach to the evaluation of local diffusion coefficients for Norway spruce sapwood from measured moisture content (MC) values are presented. A studied wood sample was dried from the initial green condition to about 15% mean MC, but here only the diffusive part of the drying process between approximately 25% and 15% mean MC was treated. Measured local MC values were based on nondestructive X-ray computed tomography data. Finite element calculations were performed with two alternative diffusion coefficients to test the appropriateness of the diffusion coefficients that were evaluated from the measured MC values. The evaluated diffusion coefficients show interesting dependence on MC and distance from the evaporation surface. The advantage of using the methods presented is that the diffusion coefficient is calculated on a local level without having to define a function for the diffusion coefficient's dependency on other parameters

Place, publisher, year, edition, pages
2006. Vol. 52, no 3, p. 195-201
National Category
Bio Materials Other Mechanical Engineering
Research subject
Wood Physics; Wood Technology
Identifiers
URN: urn:nbn:se:ltu:diva-5622DOI: 10.1007/s10086-005-0753-4ISI: 000237966100002Scopus ID: 2-s2.0-33744532133Local ID: 3c65f9b0-bb52-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-5622DiVA, id: diva2:978496
Note
Validerad; 2006; 20061016 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Danvind, JonasEkevad, Mats

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