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Permeability of Porous Ceramics Considering the Klinkenberg and Inertial Effects
Author(s) -
Innocentini Murilo D. M.,
Pandolfelli Victor C.
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00772.x
Subject(s) - slippage , permeability (electromagnetism) , darcy's law , porosity , mechanics , porous medium , thermodynamics , materials science , real gas , ceramic , pressure gradient , chemistry , physics , composite material , membrane , biochemistry
The literature reports that permeability constants differ in experiments conducted with gases or liquids. This behavior, known as the Klinkenberg effect, has been explained based on the gas‐slippage theory. We show here that inertial effects not considered by Darcy's law are the cause of variations in the gas permeability constant, k gas , with the mean pressure, P m . The dependence of k gas and P m on fluid flow is fully explained by the proposed model, based on Forchheimer's equation. The use of the gas‐slippage theory is unnecessary to explain variations in k gas obtained by Darcy's law.