Numerical modeling of 1D transient poroelastic waves in the low-frequency range

  • Authors:
  • Guillaume Chiavassa;Bruno Lombard;Joël Piraux

  • Affiliations:
  • Ecole Centrale de Marseille and MSNM-GP, 13451 Marseille, France;Laboratoire de Mécanique et d'Acoustique, 13402 Marseille, France;Laboratoire de Mécanique et d'Acoustique, 13402 Marseille, France

  • Venue:
  • Journal of Computational and Applied Mathematics
  • Year:
  • 2010

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Abstract

Propagation of transient mechanical waves in porous media is numerically investigated in 1D. The framework is the linear Biot model with frequency-independent coefficients. The coexistence of a propagating fast wave and a diffusive slow wave makes numerical modeling tricky. A method combining three numerical tools is proposed: a fourth-order ADER scheme with time-splitting to deal with the time-marching, a space-time mesh refinement to account for the small-scale evolution of the slow wave, and an interface method to enforce the jump conditions at interfaces. Comparisons with analytical solutions confirm the validity of this approach.