Effect of Specimen Length on Longitudinal Gas Permeability in Hardwoods

Authors

  • Peter J. Fogg
  • Elvin T. Choong

Keywords:

Darcy's Law, fluid flow, wood anatomy

Abstract

A study was carried out to determine whether the longitudinal gas permeability of hardwoods is affected by specimen length. The results indicate that in most woods tested, the permeability remains constant as length is reduced, except for lengths below 0.75 inch. Thereafter, with decreasing specimen length, permeability increases drastically. The large differences in permeability of samples of different length are attributed to random blockages in the capillary structure of the wood.

References

Banks, W. B. 1970. Some factors affecting the permeability of Scots pine and Norway spruce. J. Inst. Wood Sci. 5(1):10-17.nBramhall, G. 1971. The validity of Darcy's law in the axial penetration of wood. Wood Sci. Tech. 5:121-134.nChoong, E. T., F. O. Tesoro, and F. G. Manwiller. 1974. Permeability of twenty-two small diameter hardwoods growing on southern pine sites. Wood Fiber 6(1):91-101.nFogg, P. J. 1968. Longitudinal air permeability of southern pine wood. Ph.D. dissertation, La. State Univ., Baton Rouge, LA. 153 pp.nGreaves, H. 1974. A review of the influence of structural anatomy on liquid penetration into hardwoods. J. Inst. Wood Sci. 6(6):37-40.nSiau, J. F. 1984. Transport processes in wood. Springer-Verlag, New York, 245 pp.nTamblyn, N. 1960. Penetration of chemicals into wood. Proc., 5th World Forestry Congr., Seattle, WA, 1510-1515.n

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Published

2007-06-22

Issue

Number 1 / January 1989

Section

Research Contributions

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