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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.376 SNIP: 0.466 CiteScore™: 0.83

ISSN Druckformat: 2151-4798
ISSN Online: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v1.i4.60
pages 345-351

ULTIMATE LENGTH FOR REPORTING GAS PERMEABILITY OF CARPINUS BETULUSWOOD

Hamid Reza Taghiyari
Wood Science and Technology Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Yunes Sarvari Samadi
Wood Industries Department, Civil Engineering Faculty, Shahid Rajaee Teacher Training University, Iran

ABSTRAKT

The effects of specimen length on gas permeability of Carpinus betulus is reported on the basis of a study on 22.5 cm longitudinal specimens from six trees. In a decreasing process, the length of specimens was cut by 5 mm to reach to the final length of 3 cm; specific permeability values of each step were measured. Results show that longitudinal gas permeability of sapwood, for 3 cm specimens, is 219,585.31 × 10−13(m3m−1) whereas the value for heartwood is 54% lower (118,852.30 × 10−13m3m−1). Radial gas permeability values for 3 cm specimens were also measured to be 5.32 × 10−13(m3m−1) whereas those of heartwood were 55% lower (2.94 × 10−13m3m−1). Both sapwood and heartwood show the same increase pattern in their longitudinal gas permeability values as the length of the specimens decrease. Correlation coefficients show that 62% of longitudinal gas permeability values depend on length. On the other hand, considering the lowest specimen length of 5 cm, 90% of longitudinal permeability values are justified by specimen length. Therefore, it can be concluded that 5 cm long specimens give a better scope of the specific gas permeability value in Carpinus betulus.


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