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Gas Diffusion Through Sheets of Fibrous Porous Media

Nilsson, L and Stenström, Stig LU (1995) In Chemical Engineering Science 50(3). p.361-371
Abstract
Using a cell model to describe a fibrous porous medium theoretical expressions ale deduced relating effective gas diffusivity to the volume fraction of the fibres. Cylindrical as well as band-shaped fibres are studied. The new models, which are based on solutions to the diffusion equation, agree well with existing correlations. The models are compared with experimental data for water vapour diffusion through sheets of nonwoven fabric and of paper. Diffusion through a nonwoven material consisting of viscose fibres is predicted well by the present model for diffusion around cylindrical fibres. Diffusion through some paper structures such as pulp sheets and handsheets of unbeaten pulp is adequately described by the present model for... (More)
Using a cell model to describe a fibrous porous medium theoretical expressions ale deduced relating effective gas diffusivity to the volume fraction of the fibres. Cylindrical as well as band-shaped fibres are studied. The new models, which are based on solutions to the diffusion equation, agree well with existing correlations. The models are compared with experimental data for water vapour diffusion through sheets of nonwoven fabric and of paper. Diffusion through a nonwoven material consisting of viscose fibres is predicted well by the present model for diffusion around cylindrical fibres. Diffusion through some paper structures such as pulp sheets and handsheets of unbeaten pulp is adequately described by the present model for band-shaped fibres. For newsprint sheets the measured rate of diffusion is much slower than that predicted by either of the models. One explanation for the disagreement between experiment and model for newsprint could be the presence of fine material and fillers in the pores. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Engineering Science
volume
50
issue
3
pages
361 - 371
publisher
Elsevier
external identifiers
  • wos:A1995QL74300001
  • scopus:0029251105
ISSN
0009-2509
DOI
10.1016/0009-2509(94)00254-O
language
English
LU publication?
yes
id
11212086-1d23-478c-84d4-ce7c48b5d2f2 (old id 3914072)
date added to LUP
2013-07-01 11:20:33
date last changed
2017-10-08 04:19:15
@article{11212086-1d23-478c-84d4-ce7c48b5d2f2,
  abstract     = {Using a cell model to describe a fibrous porous medium theoretical expressions ale deduced relating effective gas diffusivity to the volume fraction of the fibres. Cylindrical as well as band-shaped fibres are studied. The new models, which are based on solutions to the diffusion equation, agree well with existing correlations. The models are compared with experimental data for water vapour diffusion through sheets of nonwoven fabric and of paper. Diffusion through a nonwoven material consisting of viscose fibres is predicted well by the present model for diffusion around cylindrical fibres. Diffusion through some paper structures such as pulp sheets and handsheets of unbeaten pulp is adequately described by the present model for band-shaped fibres. For newsprint sheets the measured rate of diffusion is much slower than that predicted by either of the models. One explanation for the disagreement between experiment and model for newsprint could be the presence of fine material and fillers in the pores.},
  author       = {Nilsson, L and Stenström, Stig},
  issn         = {0009-2509},
  language     = {eng},
  number       = {3},
  pages        = {361--371},
  publisher    = {Elsevier},
  series       = {Chemical Engineering Science},
  title        = {Gas Diffusion Through Sheets of Fibrous Porous Media},
  url          = {http://dx.doi.org/10.1016/0009-2509(94)00254-O},
  volume       = {50},
  year         = {1995},
}