Process of absorption and desorption of water in a wood board, with 3-dimensional transport beyond the FSP

Kouali, M’hammed El; Bouzon, J.; Vergnaud, J.M.

doi:10.1007/bf00200166

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…On the other hand, desorption is a reversed process, which starts immediately in an environment with RH < 100%. Desorption rate depends mainly on the environmental conditions (RH and temperature), and the rate of evaporation is the limiting factor of the process [51,52]. It is well established that absorption and desorption isotherms do not follow the same curve resulting in sorption hysteresis with dissimilar EMC for equal environment (RH and temperature) [53].…”

Section: Effect Of Accidental Wetting Of Wood On the Mould Growth Dev...mentioning

confidence: 99%

Conditions Influencing Mould Growth for Effective Prevention of Wood Deterioration Indoors

et al. 2022

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Effective prevention of mould growth indoors is still an important topic considering that mould growth is frequently observed in buildings, it causes serious health hazards and can irreversibly damage infected objects. Several studies have been conducted and mould growth models developed. Despite that, some potentially important aspects such as water damage and spore contamination have received only little attention. The objective of the present study was to investigate the effect of the initial moisture content of wood and spore contamination on mould development indoors. The mould tests were performed in constant temperature (10, 20 and 30 °C) and relative humidity (91% and 97%) conditions. The results show that wetting of wood specimens prior to the test significantly accelerates mould growth at a temperature of 10 °C. For the other temperatures, the effect was insignificant. Similar results were obtained for the test involving dry (conditioned at RH 50%) and conditioned specimens (RH 91% or RH 97%). The results regarding initial spore contamination show that significantly longer periods are required for mould to develop without spore contamination at 10 °C and 20 °C, while at 30 °C the effect is relatively small.

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Section: Effect Of Accidental Wetting Of Wood On the Mould Growth Dev...mentioning

confidence: 99%

Conditions Influencing Mould Growth for Effective Prevention of Wood Deterioration Indoors

et al. 2022

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“…Even though a developed mathematical model permits a wide applicability for drying problems, the computer simulation outcomes may be unreliable if the inputs are inappropriate. Previously, many researchers have simply assigned some values to their models without a solid experimental or theoretical basis, which definitely reduced the accuracy of the results [7]. In this study, the drying conditions and diffusion properties of Radiata pine are modeled on the basis of previous experimental studies.…”

Section: Introductionmentioning

confidence: 99%

Parameters for Heat Transport in Radiata Pine Board

Liu

Wang

2010

AMR

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A universal transit heat transport equation was represented and all parameters for applying such a formula to drying of Radiata pine were modeled, incorporating reasonable physical conditions. In previous empirical models, the influence of drying temperature on the conviction heat transfer was ignored, though it is parentally not negligible. In this study, a multivariate regression model was developed from previous experimental data, in which both air velocity and drying temperature were taken into consideration. In addition, the models of heat diffusion properties in axial, tangential and radial directions were presented in which drying conditions and wood properties were taken into account. With those models, scenario computer simulation may be conducted to explore the drying phenomena of Radiata pine board.

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“…While the principal diffusivities are concentration-dependent in the case of moisture transport below the fibre saturation point (FSP) (Bramhall 1976;Moschler and Martin 1968;Droin et al 1988), they can be considered, about constant when the moisture content is beyond the FSP. This is the case when the wood is immersed in water (El Kouali et al 1992;Mounji et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Release of iodine from wood in finite volumes of water in succession

Fakhouri¹,

Vergnaud²

1994

Wood Sci.Technol.

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Iodine in water is of great interest in some undeveloped countries, and wood can be used as a iodine reservoir capable of releasing it with a controlled rate. The problem of iodine release from a wooden beam is considered in this paper in a rather complex case. The beam is immersed in a finite volume of pure water for a given time, and then reimmersed successively in the same way. Equilibrium of desorption is not attained at the end of each stage of immersion. A numerical model with finite differences was built and successfully tested, providing the kinetics of release and the profiles of iodine concentration in the wood.

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Process of absorption and desorption of water in a wood board, with 3-dimensional transport beyond the FSP

Cited by 9 publications

References 13 publications

Conditions Influencing Mould Growth for Effective Prevention of Wood Deterioration Indoors

Conditions Influencing Mould Growth for Effective Prevention of Wood Deterioration Indoors

Parameters for Heat Transport in Radiata Pine Board

Release of iodine from wood in finite volumes of water in succession

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