Advances in Differential Equations

Asymptotic Biot's models in porous media

Hélène Barucq, Monique Madaune-Tort, and Patrick Saint-Macary

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This work deals with a class of evolution problems consisting of a pair of coupled equations for modelling propagation of elastic waves in fluid-saturated porous media. The type of the first equation depends on two physical parameters (density and secondary consolidation) which can vanish while the second one is always parabolic. In case the density never vanishes, the first equation is second-order hyperbolic type and a weak solution to the problem is constructed using a variational method in a Sobolev framework. Next, the proof of uniqueness involves Ladyzenskaja's test-functions used to compensate a lack of regularity that would be required in a standard energy method. This approach gives rise to a priori estimates which are useful to prove that the linearized thermoelasticity and the quasi-static systems are defined as asymptotic models of the Biot problem when the secondary consolidation coefficient or the density is small.

Article information

Adv. Differential Equations, Volume 11, Number 1 (2006), 61-90.

First available in Project Euclid: 18 December 2012

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 74F10: Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.)
Secondary: 35Q72 74H20: Existence of solutions 74H25: Uniqueness of solutions 74J05: Linear waves 76S05: Flows in porous media; filtration; seepage


Saint-Macary, Patrick; Barucq, Hélène; Madaune-Tort, Monique. Asymptotic Biot's models in porous media. Adv. Differential Equations 11 (2006), no. 1, 61--90.

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