Nonisothermal moisture movement in wood

Li, Xianjun; Bi-guang, Zhang; Li, Wenjun; Li, Yanjun

doi:10.1007/s11461-006-0039-z

Cited by 2 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…wT D denotes the Soret effect (Li et al, 2006;Siau, 1971;Siau and Jin, 1985a). It is used herein to model the capacity of the temperature pattern to generate a water flow.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature in a mass transfer simulation: application to wood

et al. 2020

View full text Add to dashboard Cite

For in situ timber structures applications, heat and mass transfer are strongly dependent on temperature. This work focuses on a parametrical modeling to evaluate and quantify temperature effect at each stage. The model is classically based on a coupling between Fourier's Law, which establishes the temporal and spatial distribution of temperature, and Fick's Law dealing specifically with the water field distribution. Several hypotheses are proposed and discussed in this work as regards thermal coupling. In particular, it is shown how to integrate temperature into a permeability correction. Also proposed herein is an interaction between temperature and the sorption isotherm. The model incorporates partial adsorption and desorption isotherms. Implementation in a finite element software allows highlighting the various couplings, in comparison with more standard calculus approaches.

show abstract

“…wT D denotes the Soret effect (Li et al, 2006;Siau, 1971;Siau and Jin, 1985a). It is used herein to model the capacity of the temperature pattern to generate a water flow.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature in a mass transfer simulation: application to wood

et al. 2020

View full text Add to dashboard Cite

show abstract

“…To reduce moisture content (MC) in wood to a low level, a prolonged drying time at higher temperatures is needed (Johanson et al 1997;Li et al 2006;Younsi et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Babiak (1996) studied temperature profiles during drying of samples with initial MC of 10% and 78%, and the initial temperatures were between -20°C (frozen lumber) and 20°C. Most of these studies measured the temperature through thermocouples (Nabhani et al 2003;Johansson and Moren 2005;Li et al 2006;Younsi et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Measured temperature and moisture profiles during thermal modification of beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) wood

2013

View full text Add to dashboard Cite

Measured temperature and moisture profiles during thermal modification of beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) wood Abstract: The temperature and moisture profiles during thermal modification of beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) wood have been investigated. Specimens with dimensions of 80 × 80 × 200 mm 3 were heat treated based on ThermoWood technology. Heat transfer was continuously measured by several thermocouples placed into various positions of the samples. In the course of the treatment, samples were removed from the chamber at different times, and their moisture content (MC) was measured by the so-called slicing technique. The complete data of heat and moisture movement during the heat treatment process are presented. Significant temperature gradients occur in the initial and modification stages of the process. In the latter, the chamber temperature was 200°C for 3 h, but exothermic reaction increased the sample temperatures to 240°C (beech) and 215°C (spruce). Thermodiffusion (Soret effect) at the beginning of the process was observed. Therefore, the MC under surfaces (in transverse and in longitudinal direction) was increasing ∼0.5%-3% for 5 h. The results provide a better insight into details of thermal modification of wood.

show abstract

Nonisothermal moisture movement in wood

Cited by 2 publications

References 12 publications

Influence of temperature in a mass transfer simulation: application to wood

Influence of temperature in a mass transfer simulation: application to wood

Measured temperature and moisture profiles during thermal modification of beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) wood

Contact Info

Product

Resources

About