Measurement of permeability I. Theory

George W. Scherer

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


According to Darcy's law, the rate of flow of liquid through a porous body is proportional to the pressure gradient in the pores. To measure the permeability, a pressure differential is applied across a layer of porous material and the rate of flow is measured. When the material is a gel, the analysis is complicated by deformation of the compliant sample under the applied pressure; in addition, there may be spontaneous contraction (syneresis) of the gel. In this paper, a viscoelastic analysis is presented that demonstrates the magnitudes of these effects. It is shown that the steady-state pressure distribution through the sample is nonlinear if the gel network is not purely elastic.

Original languageEnglish (US)
Pages (from-to)107-118
Number of pages12
JournalJournal of Non-Crystalline Solids
Issue number2-3
StatePublished - Dec 4 1989

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry


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