Experiments on Nonisothermal Moisture Movement in Wood

Authors

  • John F. Siau
  • Marian Babiak

Keywords:

Moisture movement, diffusion, activation energy

Abstract

Four experiments were conducted to measure the flux of water vapor through white pine wood transverse to the grain with an applied thermal gradient of 7 C/cm. The results were compared with a theoretical equation based on activation theory, in which both moisture-content and thermal gradients are taken into account. A reasonable agreement was found between the experimental and theoretical fluxes. The results could not be explained either on the basis of a moisture-content or partial-pressure gradient taken separately.

References

Anonymous. 1955. Wood handbook. U.S.D.A. Handbook No. 72. U.S. Government Printing Office.nChoong, E. T. 1962. Movement of moisture through a softwood in the hygroscopic range. Ph.D. Thesis. SUNY College of Environmental Science and Forestry, Syracuse, N.Y.nChoong, E. T. 1963. Movement of moisture through a softwood in the hygroscopic range. For. Prod. J.13(11):489-498.nSiau, J. F. 1971. Flow in wood. Syracuse University Press, Syracuse, N.Y.nSkaar, C, and J. F. Siau. 1981. Thermal diffusion of bound water in wood. Wood Sci. Technol.15:105-112.nStamm, A. J. 1959. Bound-water diffusion into wood in the fiber direction. For. Prod. J.9(1):27-31.nStamm, A. J. 1960. Bound-water diffusion into wood in across-the-fiber directions. For. Prod. J.10(10):524-528.nStamm, A. J. 1964. Wood and cellulose science. Ronald, New York.n

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Published

2007-06-27

Issue

Number 1 / January 1983

Section

Research Contributions

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