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arXiv · 2205.04262

Discontinuous Galerkin approximation of the fully-coupled thermo-poroelastic problem

Paola F. Antonietti·Stefano Bonetti·Michele Botti
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Abstract

We present and analyze a discontinuous Galerkin method for the numerical modelling of the non-linear fully-coupled thermo-poroelastic problem. For the spatial discretization, we design a high-order discontinuous Galerkin method on polygonal and polyhedral grids based on a novel four-field formulation of the problem. To handle the non-linear convective transport term in the energy conservation equation we adopt a fixed-point linearization strategy. We perform a robust stability analysis for the linearized semi-discrete problem under mild requirements on the problem data. A priori hp-version error estimates in suitable energy norms are also derived. A complete set of numerical simulations is presented in order to validate the theoretical analysis, to inspect numerically the robustness properties, and to test the capability of the proposed method in a practical scenario inspired by a geothermal problem.

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Paola F. Antonietti, Stefano Bonetti, Michele Botti. 2022-05-26. Discontinuous Galerkin approximation of the fully-coupled thermo-poroelastic problem. https://arxiv.org/abs/2205.04262

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