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Macroscopic X-ray c...
Macroscopic X-ray computed tomography aided numerical modelling of moisture flow in sawn timber
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- Florisson, Sara (author)
- Uppsala universitet,Luleå tekniska universitet,Träteknik,Applied Mechanics, Uppsala University, Uppsala, Sweden,Tillämpad mekanik
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- Hansson, Lars (author)
- Ocean Operations and Civil Engineering, Norwegian University of Science and Technology, Ålesund, Norway
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- Couceiro, José, 1983- (author)
- Luleå tekniska universitet,Träteknik
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- Sandberg, Dick, 1967- (author)
- Luleå tekniska universitet,Träteknik
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(creator_code:org_t)
- 2022-08-17
- 2022
- English.
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In: European Journal of Wood and Wood Products. - : Springer. - 0018-3768 .- 1436-736X. ; 80:6, s. 1351-1365
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Abstract
Subject headings
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- Mathematical models are essential for the development of schedules for the air-circulation drying of timber in Swedish sawmills, but earlier models have been shown to be conservative leading to longer drying times than necessary. In the current study, macroscopic (macro) X-ray computed tomography (CT) has been used in both the development and validation of a finite element (FE) model, to enable the macro-CT aided FE modelling of the nonlinear transient moisture flow in wood. The model uses more advanced theory than has previously been used in Swedish sawmills, by incorporating a surface emission coefficient to simulate the surface resistance to moisture flow. A single piece of Norway spruce [Picea abies (L.) Karst.] timber was subjected to that part of a traditional kiln-drying schedule, which is associated with diffusion-driven moisture transport. The incorporation of macro-CT data into the FE model resulted in a more realistic representation of the board’s geometry, the initial moisture state, and the definition of material parameters. It also led to a better simulation of flow speed and moisture gradient, especially the asymmetric MC development within the cross section throughout the drying process.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- Träteknik
- Wood Science and Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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