Modeling Wood Moisture Sorption Hysteresis Based on Similarity Hypothesis. Part 1. Direct Approach

Authors

  • Perry N. Peralta
  • Audimar P. Bangi

Keywords:

Modeling, independent-domains theory, similarity hypothesis, sorption, adsorption, desorption, isotherm, hysteresis, yellow-poplar, <i>Liriodendron tulipifera</i>

Abstract

A similarity-hypothesis approach to modeling sorption hysteresis in porous media has been applied to wood. The method, which uses the adsorption and desorption relative humidities directly as similarity statement parameters, is simpler than previously reported techniques based on the independent-domains theory since only the boundary curves of the main hysteresis loop are required in order to generate the scanning curves at a given temperature. A comparison of the predicted scanning curves with actual experimental data for yellow-poplar (Liriodendron tulipifera) indicates that the approach is highly reliable, with predicted values within 0.01 to 1.05 of the actual equilibrium moisture content of the samples at different relative humidity levels.

References

Enderby, J. A. 1955. The domain model of hysteresis. Part 1. Independent domains. Trans. Faraday Soc. 51: 835-848.nMualem, Y. 1973. Modified approach to capillary hysteresis based on a similarity hypothesis. Water Resources Res. 9(5):1324-1331.nMualem, Y. 1974. A conceptual model of hysteresis. Water Resources Res. 10(3):514-520.nPeralta, P. N. 1995a. Sorption of moisture by wood within a limited range of relative humidities. Wood Fiber Sci. 27(1): 13-21.nPeralta, P. N. 1995b. Modeling wood moisture sorption hysteresis using the independent-domain theory. Wood Fiber Sci. 27(3):250-257.nPeralta, P. N. 1996. Moisture sorption hysteresis and the independent-domain theory: The moisture distribution function. Wood Fiber Sci. 28(4):406-410.nPhilip, J. R. 1964. Similarity hypothesis for capillary hysteresis in porous materials. J. Geophys. Res. 69(8): 1553-1562.nPoulovassilis, A. 1962. Hysteresis of pore water: An application of the concept of independent domains. Soil Sci. 93:405-412.nUrquhart, A. R. 1960. Sorption isotherms. Pages 14-32 in J. W. S. Hearle and R. H. Peters, eds. Moisture in textiles. Wiley Interscience, New York, NY.n

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Published

2007-06-19

Issue

Number 1 / January 1998

Section

Research Contributions

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