Finite Difference Evaluation of Moisture Profile in Boxed-heart Large-cross-section Square Timber of Pinus densiflora during High Temperature Drying

Abstract

Predicting the amount and distribution of moisture content within wood allows calculating the various mechanical dynamics of the wood as well as determining the drying time. For boxed-heart wood with a large cross-section, since it is difficult to measure the moisture content of the interior, it is necessary to predict the moisture content distribution. This study predicted the moisture movement in boxed-heart red pine timber, during high temperature drying, by using the three-dimensional finite difference method for the efficient drying process. During drying for 72 h, the predicted and actual moisture content of the tested wood tended to decrease at a similar rate. In contrast, the actual moisture content at 196 and 240 h was lower than predicted because surface checking of the wood occurred from 72 h and excessive water emission was unexpectedly occurred from the checked and splitted surface.

Fire resistance of structural wooden walls covered by gypsum and diatomite board

“…The heat transfer through the gypsum board can be simulated using the finite difference method (Fig. 1) (Zhou et al 2011;Kim et al 2017;Hesthaven 2018;Khouya 2020). The temperature outside the gypsum board where the fire occurred followed the standard fire curve ISO 834-1 (1999)).…”

Application of Population-Based Techniques to Identification of Diffusive and Convective Parameters in Timber Drying

“…In recent years, some works have focused specifically on the numerical approximations. For instance, Kim et al [12] introduced a 3D finite difference approximation to high temperature drying. The authors discussed the discretization strategy and presented all coefficients of the algebraic equations.…”

Evaluation of the Basic Properties for the Korean Major Domestic Wood Species

“…As a result, vegetative structures are relatively complex for the territorial area, with a diversity of tree species. In the Korean Plant Names Index (KPNI), the processes and the characteristics of the material (Choi et al, 2020Gong et al, 2021;Han et al, 2022;Jang, 2022c;Jung and Yang, 2018;Jung et al, 2019Jung et al, , 2021Jung et al, , 2022Kim, 2018, 2021;Kim et al, 2017Kim et al, , 2020Lee and Bae, 2021;Lee and Kim, 2022;Lee et al, 2021cLee et al, , 2022aLee et al, , 2022bLee et al, , 2022cMin et al, 2019).…”