A heterogeneous wood drying computational model that accounts for material property variation across growth rings

Perre, Patrick & Turner, Ian W. (2002) A heterogeneous wood drying computational model that accounts for material property variation across growth rings. Chemical Engineering Journal, 86(1-2), pp. 117-131.

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In this work, a comprehensive two-dimensional drying model, known as TransPore, is extended so that the effect of material heterogeneity and local material directions on the heat and mass transport processes evolving within the medium can be investigated. The underlying mathematical theory enables the property variations as well as the spatial changes of local material directions to be taken into consideration throughout the computation. The model, which enables the behaviour of the moisture content, internal temperature and pressure fields to be monitored during the drying process, uses a control-volume finite-element (CV-FE) formulation, together with a suite of sophisticated numerical techniques to ensure both accurate and efficient simulation results. A board section of softwood is used to depict the possibilities offered by this model. In this case, the material directions vary along the section according to the pith position that defines the radial and tangential directions. In addition, the material properties change significantly from earlywood to latewood. A comparison of the overall drying kinetics generated by both the heterogeneous and the classical homogeneous models will provide a clear understanding of the impact and importance of treating the local wood properties when drying softwood.

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ID Code: 8188
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Author contact details: i.turner@qut.edu.au
Keywords: Globally convergent Newton method, Flux limiting, Control, volume finite, element method, Heterogeneous, Anisotropic
DOI: 10.1016/S1385-8947(01)00270-4
ISSN: 0009-2460
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Timber Pulp and Paper (091210)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Heat and Mass Transfer Operations (091505)
Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Analysis (010301)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2002 Elsevier
Deposited On: 22 Jun 2007 00:00
Last Modified: 10 Aug 2011 16:50

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