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Macroscopic X-ray c...
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Florisson, SaraUppsala universitet,Luleå tekniska universitet,Träteknik,Applied Mechanics, Uppsala University, Uppsala, Sweden,Tillämpad mekanik
(författare)
Macroscopic X-ray computed tomography aided numerical modelling of moisture flow in sawn timber
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
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2022-08-17
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Springer,2022
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:ltu-92595
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https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-92595URI
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https://doi.org/10.1007/s00107-022-01867-7DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-483549URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Validerad;2022;Nivå 2;2022-11-29 (hanlid);Funder: Swedish wood industry; Gabrielssons foundation
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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.
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Hansson, LarsOcean Operations and Civil Engineering, Norwegian University of Science and Technology, Ålesund, Norway
(författare)
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Couceiro, José,1983-Luleå tekniska universitet,Träteknik(Swepub:ltu)joscou
(författare)
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Sandberg, Dick,1967-Luleå tekniska universitet,Träteknik(Swepub:ltu)dicsan
(författare)
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Luleå tekniska universitetTräteknik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:European Journal of Wood and Wood Products: Springer80:6, s. 1351-13650018-37681436-736X
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