2025_programme: A demonstration of Biot-Stoll porous medium model with finite elements

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  • Day: June 17, Tuesday
      Location / Time: B. ERATO at 15:30-15:50
  • Last minutes changes: -
  • Session: 24. Underwater Seismoacoustics
    Organiser(s): Nathalie Favretto-Cristini, Paul Cristini
    Chairperson(s): Nathalie Favretto-Cristini, Paul Cristini
  • Lecture: A demonstration of Biot-Stoll porous medium model with finite elements
    Paper ID: 2108
    Author(s): Nicholas Chotiros
    Presenter: Nicholas Chotiros
    Abstract: A three-dimensional finite element model of a porous medium was constructed, for the case of water-saturated porous materials, using the codes SPECFEM2D and SPECFEM3D. The model features straight and regular pores in a visco-elastic frame, with a constant, complex bulk and shear moduli consistent with a constant-Q visco-elastic material. A range of porosities were realized. The model has an upper frequency limit dictated by the size of the mesh elements, and a lower frequency limit determined by the external dimensions of the model. Within the frequency range of the model, the presence of the Biot fast and slow waves was demonstrated, as well a shear wave. The attenuation of the Biot waves is shown to be consistent with a constant-Q visco-elastic frame and the Biot-Stoll model. [Work supported by ONR, Ocean Acoustics Program]
  • Corresponding author: Dr Nicholas Chotiros
    Affiliation: The University of Texas at Austin
    Country: United Kingdom

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