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Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

12 Issues per year


IMPACT FACTOR 2016: 1.868
5-year IMPACT FACTOR: 1.875

CiteScore 2016: 1.83

SCImago Journal Rank (SJR) 2015: 0.817
Source Normalized Impact per Paper (SNIP) 2015: 0.954

Online
ISSN
1437-434X
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Volume 63, Issue 5 (Sep 2009)

Issues

Non-destructive determination and quantification of diffusion processes in wood by means of neutron imaging

David Mannes
  • Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, Zurich, Switzerland
  • Spallation Neutron Source (ASQ), Paul Scherrer Institute (PSI), Villigen, Switzerland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Walter Sonderegger
  • Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, Zurich, Switzerland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Stefan Hering
  • Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, Zurich, Switzerland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Eberhard Lehmann / Peter Niemz
  • Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, Zurich, Switzerland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2009-06-29 | DOI: https://doi.org/10.1515/HF.2009.100

Abstract

Diffusion processes in samples of European beech (Fagus sylvatica L.) and Norway spruce (Picea abies [L.] Karst.) were determined and quantified by means of neutron imaging (NI). The experiments were carried out at the neutron imaging facility NEUTRA at the Paul Scherrer Institute in Villigen (Switzerland) using a thermal neutron spectrum. NI is a non-destructive and non-invasive testing method with a very high sensitivity for hydrogen and thus water. Within the scope of this study, diffusion processes in the longitudinal direction were ascertained for solid wood samples exposed to a differentiating climate (dry side/wet side). With NI it was possible to determine the local distribution and consequently the total amount of water absorbed by the samples. The calculated values scarcely differ from those ascertained by weighing (≤3%). The method yields profiles of the water content over the whole sample, thus allowing the local and temporal resolution of diffusion processes within the sample in the main transport direction (longitudinal). On the basis of these profiles, it was possible to calculate the diffusion coefficients along the fibre direction according to Fick's second law.

Keywords: diffusion; diffusion coefficient; moisture content; neutron imaging; non-destructive testing; wood

About the article

Corresponding author. Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, ETH Zurich, 8093 Zurich, Switzerland Phone: +41-44-632-3228 Fax: +41-44-632-1174


Received: 2009-02-03

Accepted: 2009-05-11

Published Online: 2009-06-29

Published Online: 2009-06-29

Published in Print: 2009-09-01


Citation Information: Holzforschung, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/HF.2009.100.

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David Mannes, Florian Schmid, Timon Wehmann, and Eberhard Lehmann
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D. Mannes, S. Sanabria, M. Funk, R. Wimmer, K. Kranitz, and P. Niemz
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Bauphysik, 2013, Volume 35, Number 2, Page 119
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Marjan Sedighi-Gilani, Michele Griffa, David Mannes, Eberhard Lehmann, Jan Carmeliet, and Dominique Derome
International Journal of Heat and Mass Transfer, 2012, Volume 55, Number 21-22, Page 6211
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J. Eitelberger, K. Hofstetter, and S.V. Dvinskikh
Composites Science and Technology, 2011, Volume 71, Number 15, Page 1727
[12]
Sergio J. Sanabria, Peter Wyss, Juerg Neuenschwander, Peter Niemz, and Urs Sennhauser
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Walter Sonderegger, Manuele Vecellio, Pascal Zwicker, and Peter Niemz
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