＜紀要論文＞A Mathematical Model of the Moisture Gradient in Air–Dried Square Heavy Timbers of Japanese Red Pine

作成者 作成者名 所属機関 所属機関名 Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University 作成者名 所属機関 所属機関名 Department of Mathematics, College of Natural Science, Chonbuk National University 作成者名 所属機関 所属機関名 Department of Bio–based Materials, Chungnam National University 作成者名 所属機関 所属機関名 Department of Bio–based Materials, Chungnam National University 作成者名 所属機関 所属機関名 Course of Sustainable Bioresources Science, Department of Agro–environmental Sciences, Faculty of Agriculture, Kyushu University 作成者名 所属機関 所属機関名 Laboratory of Wood Material Technology, Division of Sustainable Bioresources Science, Department of Agro–environmental Sciences, Faculty of Agriculture, Kyushu University 九州大学大学院農学研究院環境農学部門サスティナブル資源科学講座 英語 Faculty of Agriculture, Kyushu University 九州大学大学院農学研究院 2015-09-18 60 2 445 450 Version of Record open access https://doi.org/10.5109/1543407 http://www.agr.kyushu-u.ac.jp/

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PISSN 0023-6152 AA00697606 1543407 査読無 Air drying Longitudinal kerfing Moisture content gradient Mathematical simulation 0023-6152 Moisture content variation along the thickness direction of square heavy timbers of Japanese red pine (20 × 20–cm cross–section, 360 cm length) of a control and those kerfed in the longitudinal direction were mathematically simulated during air drying. The model was based on anatomical features, and the heat and mass transfer of the wood. The model was solved numerically in order to predict the moisture content profiles. Then, the estimated moisture content variation was compared to that of the experimental value of the square heavy timbers. The square heavy timbers were dried to a moisture content of 14% for the kerfed and 15% for the control wood. The final moisture content differences between the internal and external layers of the kerfed and control wood specimens were 2% and 2.5%, respectively. The moisture gradient in the thickness direction was very smooth. The moisture content variance in the thickness direction with kerfing was almost same to that of the control. The mathematically estimated moisture gradient was in good agreement with the experimentally evaluated values. 2015.10.16 2022.11.11