Abstract
The paper presents a model of moisture transport in wood taking into account diffusion and the accompanying adsorption of water vapour through the skeleton. A two-parameter form of the source term was proposed, depending on the distance of the current moisture content (MC) from the equilibrium state. The tests on cubic samples with a side of 2 cm were carried out which allowed to determine the coefficients of the proposed model on the basis of the reverse method. The tests were performed for pine, larch, oak and ash in all directions of orthotropy. Tests on thin samples were also performed to verify the source term.
Highlights
IntroductionThe most important from the point of view of material engineering is the transport of moisture in the range of the moisture content of the wood corresponding to dry conditions and the moisture content occurring at full saturation of the fibres, i.e., in the moisture content from 0% to 30% [1,2]
As a result of calculations carried out in accordance with the scheme presented in Section 4, the parameter values of the proposed model of moisture transport in wood were obtained
The model of moisture transport in wood proposed in the paper describes very well the diffusion process in the range of moisture present in the studies
Summary
The most important from the point of view of material engineering is the transport of moisture in the range of the moisture content of the wood corresponding to dry conditions and the moisture content occurring at full saturation of the fibres, i.e., in the moisture content from 0% to 30% [1,2]. In this range of moisture in wood there is water in the form of water vapour and water bound by surface forces, and changes in its content lead to shrinkage or swelling of the wood [3]
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