The role of rheology in modelling elastic waves with gas bubbles in granular fluid-saturated media
Article
Article Title | The role of rheology in modelling elastic waves with gas bubbles in granular fluid-saturated media |
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ERA Journal ID | 36514 |
Article Category | Article |
Authors | Ali, Adham A. (Author) and Strunin, Dmitry V. (Author) |
Journal Title | Journal of Mechanics of Materials and Structures |
Journal Citation | 14 (1), pp. 1-24 |
Number of Pages | 24 |
Year | 2019 |
Place of Publication | United States |
ISSN | 1559-3959 |
Digital Object Identifier (DOI) | https://doi.org/10.2140/jomms.2019.14.1 |
Web Address (URL) | https://msp.org/jomms/2019/14-1/jomms-v14-n1-p01-p.pdf |
Abstract | Elastic waves in fluid-saturated granular media depend on the rheology which includes elements representing the fluid and, if necessary, gas bubbles. We investigated the effect of different rheological schemes, including and excluding the bubbles, on the linear Frenkel–Biot waves of P1 type. For the wave with the bubbles the scheme consists of three segments representing the solid continuum, fluid continuum, and a bubble surrounded by the fluid. We derived the Nikolaevskiy-type equations describing the velocity of the solid matrix in the moving reference system. The equations are linearized to yield the decay rate lambda as a function of the wave number k. We compared the lambda(k)-dependence for the cases with and without the bubbles, using typical values of the input mechanical parameters. For the both cases, the lambda(k)-curve lies entirely below zero, which is in line with the notion of the elastic wave being an |
Keywords | Frenkel–Biot’s waves, bubbles, rheology, porous media |
ANZSRC Field of Research 2020 | 370609. Seismology and seismic exploration |
490105. Dynamical systems in applications | |
490109. Theoretical and applied mechanics | |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q58w0/the-role-of-rheology-in-modelling-elastic-waves-with-gas-bubbles-in-granular-fluid-saturated-media
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