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Derivation of equations of seismic and acoustic wave propagation and equations of filtration via homogenization of periodic structures

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Abstract

A linear system of differential equations describing a joint motion of elastic porous body and fluid occupying porous space is considered. Although the problem is linear, it is very hard to tackle due to the fact that its main differential equations involve nonsmooth oscillatory coefficients, both big and small, under the differentiation operators. The rigorous justification, under various conditions imposed on physical parameters, is fulfilled for homogenization procedures as the dimensionless size of the pores tends to zero, while the porous body is geometrically periodic. As the results for different ratios between physical parameters, we derive Biot’s equations of poroelasticity, a system consisting of nonisotropic Lamé’s equations for the solid component and acoustic equations for the liquid component, nonisotropic Lamé’s equations or equations of viscoelasticity for one-velocity continuum, decoupled system consisting of Darcy’s system of filtration or acoustic equations for the liquid component (first approximation) and nonisotropic Lamé’s equations for the solid component (second approximation), a system consisting of nonisotropic Stokes equations for the liquid component and acoustic equations for the solid component, nonisotropic Stokes equations for one-velocity continuum, or, finally a different type of acoustic equations for one- or two-velocity continuum. The proofs are based on Nguetseng’s two-scale convergence method of homogenization in periodic structures.

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Authors and Affiliations

  1. Belgorod State University, 308015, Belgorod, Russia

    A. M. Meirmanov

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  1. A. M. Meirmanov
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Correspondence to A. M. Meirmanov.

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Translated from Trudy Seminara imeni I. G. Petrovskogo, No. 27, Part II, pp. 178–239, 2009.

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Meirmanov, A.M. Derivation of equations of seismic and acoustic wave propagation and equations of filtration via homogenization of periodic structures. J Math Sci 163, 111–150 (2009). https://doi.org/10.1007/s10958-009-9666-x

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  • DOI: https://doi.org/10.1007/s10958-009-9666-x

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