Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood

The undesired wood instabilities are connected with the changes of bound water moisture content. The rates of finite changes of bound water moisture content in a given volume of wood were determined in the frame of the specimen dimensions. The derivation is based on the 1st Fick’s law and diffusion...

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Autor principal:	Richard Hrčka
Formato:	article
Lenguaje:	EN
Publicado:	University of Zagreb, Faculty of Forestry and Wood Technology 2016
Materias:	beech wood diffusion coeffi cient moisture content diffusion coefficient Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/d5d26c80db8d4bbab15acc9077270476
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id	oai:doaj.org-article:d5d26c80db8d4bbab15acc9077270476
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spelling	oai:doaj.org-article:d5d26c80db8d4bbab15acc90772704762021-12-02T03:43:42ZFinite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood10.5552/drind.2015.15060012-67721847-1153https://doaj.org/article/d5d26c80db8d4bbab15acc90772704762016-01-01T00:00:00Zhttp://hrcak.srce.hr/file/221889https://doaj.org/toc/0012-6772https://doaj.org/toc/1847-1153The undesired wood instabilities are connected with the changes of bound water moisture content. The rates of finite changes of bound water moisture content in a given volume of wood were determined in the frame of the specimen dimensions. The derivation is based on the 1st Fick’s law and diffusion equation solution in three dimensions. The inverse solution of diffusion equation provided the diffusion coefficients in the principal anatomical directions. Beech wood was tested. The nonlinear regression is involved in the inverse solution. Therefore, the starting values of diffusion coefficients were computed according to the proposed three dimensional square root scheme. The evaluation of data revealed the random character of transport characteristics. The sufficient condition for the slowest finite change of ound water moisture content in a given volume of beech wood is the ratio 8.7:1.5:1.0 of dimensions in longitudinal, radial and tangential directions.Richard HrčkaUniversity of Zagreb, Faculty of Forestry and Wood Technologyarticlebeech wooddiffusion coeffi cientmoisture contentdiffusion coefficientForestrySD1-669.5ENDrvna Industrija, Vol 66, Iss 4, Pp 315-320 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	beech wood diffusion coeffi cient moisture content diffusion coefficient Forestry SD1-669.5
spellingShingle	beech wood diffusion coeffi cient moisture content diffusion coefficient Forestry SD1-669.5 Richard Hrčka Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
description	The undesired wood instabilities are connected with the changes of bound water moisture content. The rates of finite changes of bound water moisture content in a given volume of wood were determined in the frame of the specimen dimensions. The derivation is based on the 1st Fick’s law and diffusion equation solution in three dimensions. The inverse solution of diffusion equation provided the diffusion coefficients in the principal anatomical directions. Beech wood was tested. The nonlinear regression is involved in the inverse solution. Therefore, the starting values of diffusion coefficients were computed according to the proposed three dimensional square root scheme. The evaluation of data revealed the random character of transport characteristics. The sufficient condition for the slowest finite change of ound water moisture content in a given volume of beech wood is the ratio 8.7:1.5:1.0 of dimensions in longitudinal, radial and tangential directions.
format	article
author	Richard Hrčka
author_facet	Richard Hrčka
author_sort	Richard Hrčka
title	Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
title_short	Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
title_full	Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
title_fullStr	Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
title_full_unstemmed	Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood
title_sort	finite changes of bound water moisture content in a given volume of beech wood
publisher	University of Zagreb, Faculty of Forestry and Wood Technology
publishDate	2016
url	https://doaj.org/article/d5d26c80db8d4bbab15acc9077270476
work_keys_str_mv	AT richardhrcka finitechangesofboundwatermoisturecontentinagivenvolumeofbeechwood
_version_	1718401702092079104

Finite Changes of Bound Water Moisture Content in a Given Volume of Beech Wood

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