NDLI: Characterization of wood micromorphology from gas permeability measurements

Content Provider	Springer Nature Link
Author	Ai, Wei Duval, Hervé Pierre, Floran Perré, Patrick
Copyright Year	2017
Abstract	This paper presents a method for identifying wood morphological parameters from gas apparent permeability measurements. The apparent permeability at a given mean pressure is typically determined from the pressure relaxation kinetics when the gas permeates through the wood sample between two compartments which have different initial pressures. Using the proposed set-up, apparent permeability values ranging from 10−10 to 10−18 m2 can be measured with a mean gas pressure varying from 2 bar down to 35 mbar. Morphological and topological parameters are then identified from the variations in apparent permeability as a function of the mean gas pressure using a pore network model. The network consists of elements such as pipes or orifices connected in series or in parallel. The rarefied gas flow is described in each element by an appropriate model, and the unknowns are determined by an inverse method. This approach was first applied to track-etched polycarbonate membranes for validation purposes. The calculated pore radius and pore density values were compared to observations by environmental scanning electron microscopy. Softwood specimens were then investigated. The mean radius of the pores controlling permeability in the longitudinal and tangential directions was determined and found to be in good agreement with literature data.
Starting Page	1
Ending Page	15
Page Count	15
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	21
Issue Number	6
e-ISSN	16134990
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-05-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Porous media Cellular tissue Pore network model Rarefied gas dynamics Slip flow Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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