77 水分伝導度と比重の関係について

概要

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It was reported that the moisture conductivity, which is the coefficient K of ∂u/∂t=K∂^2u/∂x^2,was a value schowing the facility for movement of moisture through wood below fibresaturation point at the part of center of wood. The values of K were caluculated from the drying process experimented in a thermostat keeping at 50℃, 50〜55% on samples of size 15×10×1.0(cm) of 12 specimens. Relation between moisture conductivity K and specific gravity r, is showed in a curve as shown in Fig. 1. Assuming that the cell walls given resistance for movement of moisture arrange diagramically as in Fig. 2 and the resistances are parallel in direction of moisture movement, relation between the facility for moisture movement 1/R and specific gravity r are obtaine, as in Fig. 3,and then K is related lineary on 1/R as ahown in Fig. 4.
一般社団法人日本森林学会の論文
1951-12-25