DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS

The sapwood fibers in green softwood are normally filled - or nearly filled - with free water. This water forms a continuous phase through the narrow bordered pits between fiber lumens. In a drying process water evaporates from the menisci formed at these narrow throats and initially located close t...

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Autor principal:	Salin,Jarl-Gunnar
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2006
Materias:	wood drying percolation simulation drying rate dry shell
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2006000300002
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id	oai:scielo:S0718-221X2006000300002
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spelling	oai:scielo:S0718-221X20060003000022006-12-01DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESSSalin,Jarl-Gunnar wood drying percolation simulation drying rate dry shell The sapwood fibers in green softwood are normally filled - or nearly filled - with free water. This water forms a continuous phase through the narrow bordered pits between fiber lumens. In a drying process water evaporates from the menisci formed at these narrow throats and initially located close to the surface of the wood. As the amount of free water decreases in this way, a retraction of the meniscus will happen in the widest throat, which can be located anywhere, not necessarily close to the surface. As the individual size of these narrow throats is a stochastic variable, this process will produce complicated water phase structures that gradually fragmentize. If this drying behavior is viewed as such an invasion percolation process it is obvious that the result differs from normal diffusion, which however most often is used as the basis for wood drying modeling. A computer based simulation model that utilizes the above principle has been developed. This model has been used for the simulation of a few situations of practical and theoretical importance. It has been found that this invasion percolation approach can reproduce some previously unexplained features seen in softwood drying processes. Some detailed examples are presented in this paperinfo:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.8 n.3 20062006-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2006000300002en10.4067/S0718-221X2006000300002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	wood drying percolation simulation drying rate dry shell
spellingShingle	wood drying percolation simulation drying rate dry shell Salin,Jarl-Gunnar DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
description	The sapwood fibers in green softwood are normally filled - or nearly filled - with free water. This water forms a continuous phase through the narrow bordered pits between fiber lumens. In a drying process water evaporates from the menisci formed at these narrow throats and initially located close to the surface of the wood. As the amount of free water decreases in this way, a retraction of the meniscus will happen in the widest throat, which can be located anywhere, not necessarily close to the surface. As the individual size of these narrow throats is a stochastic variable, this process will produce complicated water phase structures that gradually fragmentize. If this drying behavior is viewed as such an invasion percolation process it is obvious that the result differs from normal diffusion, which however most often is used as the basis for wood drying modeling. A computer based simulation model that utilizes the above principle has been developed. This model has been used for the simulation of a few situations of practical and theoretical importance. It has been found that this invasion percolation approach can reproduce some previously unexplained features seen in softwood drying processes. Some detailed examples are presented in this paper
author	Salin,Jarl-Gunnar
author_facet	Salin,Jarl-Gunnar
author_sort	Salin,Jarl-Gunnar
title	DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
title_short	DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
title_full	DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
title_fullStr	DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
title_full_unstemmed	DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS
title_sort	drying of sapwood analyzed as an invasion percolation process
publisher	Universidad del Bío-Bío
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2006000300002
work_keys_str_mv	AT salinjarlgunnar dryingofsapwoodanalyzedasaninvasionpercolationprocess
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DRYING OF SAPWOOD ANALYZED AS AN INVASION PERCOLATION PROCESS

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