title: Guided wave modes in porous cylinders: experimental results.
abstract: In this paper guided wave modes in porous media are investigated. A water-saturated porous cylinder is mounted in the test section of a shock tube. Between the porous sample and the wall of the shock tube a water-filled annulus exists. For very small annulus width, bulk waves are generated and one-dimensional modeling is sufficient. Otherwise two-dimensional effects become important and multiple guided wave modes occur. Using a newly developed traversable positioning system in the shock tube, the frequency-dependent phase velocities and damping coefficients in the 1-120 kHz frequency range were measured. Prony's method was used for data processing. Agreement was found between the experimental data and the two-dimensional modeling of the shock tube which was based on Biot's theory.
authors.affiliation: Delft University of Technology, Department of Applied Earth Sciences, The Netherlands.
authors.forename: C J
authors.initials: CJ
authors.lastname: Wisse
authors.forename: D M J
authors.initials: DM
authors.lastname: Smeulders
authors.forename: M E H
authors.initials: ME
authors.lastname: van Dongen
authors.forename: G
authors.initials: G
authors.lastname: Chao