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多孔介质期刊
影响因子: 1.061 5年影响因子: 1.151 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v13.i11.80
pages 1017-1024

MASS TRANSFER IN WOOD: IDENTIFICATION OF STRUCTURAL PARAMETERS FROM DIFFUSIVITY AND PERMEABILITY MEASUREMENTS

Eusebe Agoua
Laboratoire d’Energétique et de Mécanique Appliquée (LEMA/EPAC/UAC)
Patrick Perre
Laboratoire de Genie des Procedes et des Materiaux, Ecole Centrale Paris, CentraleSupelec, campus de Chatenay-Malabry Grande Voie des Vignes F-92 295 Chatenay-Malabry Cedex, Paris, France

ABSTRACT

This article proposes a rapid way to use experimental measurements of mass transferminus;mass diffusivity and permeability to air−to compute two global morphological parameters of wood: tortuosity factor and equivalent pore radius. The device conceived for measuring mass diffusing in steady state is a specific vaporimeter PVC-CHA. For air permeability, another device, ALU-CHA, has been developed. Using a simple structure modeling of the porous medium to analyze the transport phenomena, the two global morphologic parameters cited have been fitted. Spruce, pine, beech, and teak are tested through samples (about 24) of these species, sawed for longitudinal, tangential, and radial directions flows. Some of the measurements are exploited. The results obtained for tortuosity and equivalent pore radius have been compared with those found in the anatomical literature, and a good concordance has been observed.


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