Abstract
The propagation of compressional waves in a porous medium is investigated in case the pore liquid contains a small volume fraction of gas. The effect of oscillating gas bubbles is taken into account by introducing a frequency-dependent fluid bulk modulus, which is incorporated in the Biot theory. Using a shock tube technique, new experimental data are obtained for a porous column subjected to a pressure step wave. An oscillatory behaviour is observed, consisting of two distinct frequency bands, which is predicted by the theoretical analysis.
Original language | English |
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Pages (from-to) | 25-37 |
Number of pages | 13 |
Journal | Transport in Porous Media |
Volume | 9 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1 Oct 1992 |
Keywords
- dispersion
- gas bubbles
- shock tube
- Waves