Water vapor permeability of porous media

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Journal titleCanadian Journal of Physics
Pages413416; # of pages: 4
AbstractFollowing the analogy between the laws of heat conduction and vapor diffusion, two theoretical expressions for the thermal conductivity of a composite medium are applied to the water vapor permeability coefficient of certain porous media. It is shown that both expressions reduce to a form very similar to the empirical relationships found by Penman and Edenholm for soils, glass spheres. charcoal, and cellular concrete. The calculation of the variation of water vapor permeability with density for a cellular lightweight concrete is illustrated.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number5071
NPARC number20338499
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Record identifierbc6b3a2e-bdb7-45d3-806e-503f055f056b
Record created2012-07-19
Record modified2016-05-09
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