RT Journal Article
ID 6499e2cb76e10b3a
A1 Taghiyari, Hamid Reza
A1 Rahbari, Alireza
A1 Homayoonfar, Sajad
A1 Kadkhodapour, Javad
T1 EXPERIMENTAL AND COMPUTATIONAL CALCULATION OF LONGITUDINAL SPECIFIC AIR PERMEABILITY IN POPULUS DELTOIDES AND POPULUS EUROAMERICANA WOOD
JF Journal of Porous Media
JO JPM
YR 2016
FD 2016-11-02
VO 19
IS 11
SP 931
OP 940
K1 extractives
K1 longitudinal specific air permeability
K1 porous materials
K1 vessel diameter
AB Specific air permeability was measured in the juvenile and mature sections of two poplar species at three different vacuum pressures using an apparatus with 0.001 s precision; the values were then compared with those obtained through computational calculations based on the number and diameter of vessels in each section. Cylindrical longitudinal specimens were prepared with 17.5 mm diameter, at two lengths of 50 and 100 mm. Results showed that vacuum pressure did not affect the experimental permeability values, although at lower pressures the permeability values tended to slightly decrease. Computational calculation of permeability showed the same permeability values for the two lengths of specimens in both species, while the values obtained from experimental measurement were significantly different due to the settlement of extractives in vessel elements. Permeability values obtained by computational calculations showed compatibility with vessel lumen area and diameter properties; however, no compatibility was found with vessel frequency. Significant correlation was found between the computational and experimental permeability values only when extractive content was low, and when the number and diameter of vessel elements were within a suitable range for computational modeling. It was therefore concluded that further studies should be carried out on a variety of different wood species to establish a final and authentic model for prediction of specific permeability based on the porous structure and vessel properties.
PB Begell House
LK https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,16fe8ec8018a6b88,6499e2cb76e10b3a.html