Wave propagation in porous media containing a dilute gas–liquid mixture: theory and experiments

Research output: Contribution to journalArticleAcademicpeer-review

54 Citations (Scopus)
2 Downloads (Pure)

Abstract

The influence of a small amount of gas within the saturating liquid of a porous medium on acoustic wave propagation is investigated. It is assumed that the gas volumes are spherical, homogeneously distributed, and that they are within a very narrow range of bubble sizes. It is shown that the compressibility of the saturating fluid is determined by viscous, thermal, and a newly introduced Biot-type damping of the oscillating gas bubbles, with mean gas bubble size and concentration as important parameters. Using a super-saturation technique, a homogeneous gas–liquid mixture within a porous test column is obtained. Gas bubble size and concentration are measured by means of compressibility experiments. Wave reflection and propagation experiments carried out in a vertical shock tube show pore pressure oscillations, which can be explained by incorporating a dynamic gas bubble behaviour in the linear Biot theory for plane wave propagation.
Original languageEnglish
Pages (from-to)351-373
Number of pages23
JournalJournal of Fluid Mechanics
Volume343
DOIs
Publication statusPublished - 1997

Fingerprint Dive into the research topics of 'Wave propagation in porous media containing a dilute gas–liquid mixture: theory and experiments'. Together they form a unique fingerprint.

  • Cite this