Scientia Silvae Sinicae ›› 1998, Vol. 34 ›› Issue (4): 88-95.
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Youke Zhao,Fucheng Bao
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Abstract:
The relationship between softwood longitudinal permeability and its structure was systematically studied based upon the principles of flow. The results showed that the specific permeability coefficient (K) was proportional to the number of flow paths every unit area, the ratio of average tracheid length to the equivalent thickness of the pit membrane and the specific permeability coefficient of pit openings. The results had been tested and were in a good agreement with the data presented by Jiang(1993).
Key words: Capillary structure of softwood, Longitudinal(axial) permeability, Principle of flow
Youke Zhao,Fucheng Bao. THEORETICAL ANALYSIS ON THE RELATIONSHIP BETWEEN SOFTWOOD LONGITUDINAL PERMEABILITY AND ITS STRUCTURE[J]. Scientia Silvae Sinicae, 1998, 34(4): 88-95.
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Fig.1
Softwood structure model for longitudinal flow"
Fig.2
Softwood longitudinal flow model"
Fig.3
Longitudinal flow model based upon parallel, uniform pit openings"
Fig.4
Permeability illustration of n units in series"
Fig.5
Permeability illustration of n units in parallel"
Table
Ratio between measured permeability and that between calculated"
