## A coupling of mixed and continuous Galerkin finite element methods for poroelasticity. II: The discrete-in-time case.(English)Zbl 1117.74016

Summary: In this paper, we formulate a finite element procedure for approximating the coupled fluid and mechanics in Biot’s consolidation model of poroelasticity. Here, we approximate the pressure by a mixed finite element method and the displacements by a Galerkin method. Theoretical convergence error estimates are derived in a discrete-in-time setting. Of particular interest is the case when the lowest-order Raviart-Thomas approximating space or cell-centered finite differences are used in the mixed formulation and continuous piecewise linear approximations are used for displacements. This approach appears to be the one most frequently applied to existing reservoir engineering simulators.

### MSC:

 74F10 Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.) 65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs 74S05 Finite element methods applied to problems in solid mechanics 76M10 Finite element methods applied to problems in fluid mechanics 76S05 Flows in porous media; filtration; seepage

Zbl 1117.74015

deal.ii
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### References:

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