Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Journal of Porous Media
Impact-faktor: 1.49 5-jähriger Impact-Faktor: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

Volumes:
Volumen 22, 2019 Volumen 21, 2018 Volumen 20, 2017 Volumen 19, 2016 Volumen 18, 2015 Volumen 17, 2014 Volumen 16, 2013 Volumen 15, 2012 Volumen 14, 2011 Volumen 13, 2010 Volumen 12, 2009 Volumen 11, 2008 Volumen 10, 2007 Volumen 9, 2006 Volumen 8, 2005 Volumen 7, 2004 Volumen 6, 2003 Volumen 5, 2002 Volumen 4, 2001 Volumen 3, 2000 Volumen 2, 1999 Volumen 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v19.i11.10
pages 931-940

EXPERIMENTAL AND COMPUTATIONAL CALCULATION OF LONGITUDINAL SPECIFIC AIR PERMEABILITY IN POPULUS DELTOIDES AND POPULUS EUROAMERICANA WOOD

Hamid Reza Taghiyari
Wood Science and Technology Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Alireza Rahbari
The Australian National University
Sajad Homayoonfar
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Javad Kadkhodapour
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

ABSTRAKT

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.


Articles with similar content:

CFD SIMULATION OF FORCED CONVECTIVE HEAT TRANSFER BY TETRAKAIDECAHEDRON MODEL IN METAL FOAMS
Journal of Porous Media, Vol.19, 2016, issue 1
Mahmood Meratian, Masoud Panjepour, Mohsen Davazdah Emami, Mohammad Zafari
RADIATION HEAT TRANSFER IN FOAM INSULATION
International Heat Transfer Conference 9, Vol.6, 1990, issue
Mark Torpey, Mark Mozgowiec , Leon R. Glicksman
A NEW EMPIRICAL CORRELATION FOR PREDICTING EFFECTIVE MOLECULAR DIFFUSIVITY OF GAS-HEAVY OIL-POROUS MEDIA SYSTEMS
Special Topics & Reviews in Porous Media: An International Journal, Vol.3, 2012, issue 1
N. Mirjordavi, M. Kazemeini, E. Zamanian, Mohammad Hossein Ghazanfari
Experimental and Numerical Analysis of Drying of Particles in Superheated Steam
Journal of Porous Media, Vol.2, 1999, issue 3
Omar Rahli, Lounes Tadrist, Frederic Topin
EFFECT OF COLLECTION DISTANCE ON THE DIAMETER OF ELECTROSPUN NANOFIBER
Heat Transfer Research, Vol.44, 2013, issue 5
Hai-Yan Kong