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Influence of drying and wetting on the wave propagation in partially saturated soils
Author(s) -
Albers Bettina
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410331
Subject(s) - wetting , hysteresis , capillary pressure , mechanics , capillary action , porous medium , wave propagation , capillary wave , soil water , longitudinal wave , geotechnical engineering , porosity , materials science , geology , physics , surface wave , optics , soil science , composite material , condensed matter physics
The propagation of sound waves in Del Monte sand filled by an air‐water mixture is studied by a linear model. Even if it does not include an operator to describe the hysteresis of the capillary pressure curve, hysteresis is accounted for: the wave analysis is performed for the two limit cases of main drying and main wetting. In the van Genuchten law both drying and wetting data are applied. Four waves appear: one transversal wave and three longitudinal waves. For the waves driven mainly by the skeleton it could be expected that the influence of consideration of the hysteresis in the capillary pressure curve is negligible. In contrast, the numerical results for the waves driven by the pore fluids exhibit a smaller influence than expected. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)