Weakly Imposed Symmetry and Robust Preconditioners for Biot’s Consolidation Model

We discuss the construction of robust preconditioners for finite element approximations of Biot’s consolidation model in poroelasticity. More precisely, we study finite element methods based on generalizations of the Hellinger–Reissner principle of linear elasticity, where the stress tensor is one o...

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Bibliographic Details
Published in:Journal of computational methods in applied mathematics 2017-07, Vol.17 (3), p.377-396
Main Authors: Bærland, Trygve, Lee, Jeonghun J., Mardal, Kent-Andre, Winther, Ragnar
Format: Article
Language:English
Subjects:
65N30
65N55
74S05
Computational fluid dynamics
Conditioning
Consolidation
Discretization
Elasticity
Finite element method
Finite Elements
Mathematical models
Parameters
Poroelasticity
Preconditioning
Robustness
Tensors
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Summary:We discuss the construction of robust preconditioners for finite element approximations of Biot’s consolidation model in poroelasticity. More precisely, we study finite element methods based on generalizations of the Hellinger–Reissner principle of linear elasticity, where the stress tensor is one of the unknowns. The Biot model has a number of applications in science, medicine, and engineering. A challenge in many of these applications is that the model parameters range over several orders of magnitude. Therefore, discretization procedures which are well behaved with respect to such variations are needed. The focus of the present paper will be on the construction of preconditioners, such that the preconditioned discrete systems are well-conditioned with respect to variations of the model parameters as well as refinements of the discretization. As a byproduct, we also obtain preconditioners for linear elasticity that are robust in the incompressible limit.
ISSN:1609-4840
1609-9389
DOI:10.1515/cmam-2017-0016