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2.2 Permeability (2. Physical Properties of Sulawesi Woods)
2.2 通気特性 (2. スラウェシー産材の物理特性)
金川, 靖
18854
KANAGAWA, Yasushi
18855
1984-12
Permeability Properties: The permeability of wood was an indicator for wood preservation, chemical modification, wood drying and others. The permeability depended on the flow direction and the situation of path way. Specially, in longitudinal direction of hard woods, the permeability depended on contents like as tylose in vessels. In this paper, the permeability in longitudinal direction was measured under various conditions with a evacuation method (see Fig. 1). Dimension of cylindrical specimen used was 3 cm in diameter and 10 cm in length. Almost of species was measured permeabilities at several positions in radial. when there were contents in vessel, path ways were died with a fluorochrome (Rhodamine B) water solution and observed. Results obtained were as follows; (1) Permeabilities in sap woods were 10^0-10^2 darcy. On other hand, permeabilities in heart wood were distributed in very wide range of 10^-3 - 10^2 darcy. These results depended on existence of contents like as tylose in vessel (see Fig.4 and Photo 1 -4). (2)Permeability and slip flow factor had a opposite relationship (see Fig. 5,6). (3)In case of filling in vessel with tylose or closing perforation plate with some contents, fibers and parenchyma cells gathered to vessel did not performed to flow and its permeability decreased steaply to 10^-2 darcy.
農林水産研究情報センターで作成したPDFファイルを使用している。
departmental bulletin paper
名古屋大学農学部付属演習林
1984-12
名古屋大学農学部演習林報告
8
79
93
http://hdl.handle.net/2237/8682
0469-4708
jpn
http://rms1.agsearch.agropedia.affrc.go.jp/contents/JASI/pdf/academy/40-2634.pdf