Hybridized Discontinuous Galerkin Methods for a Multiple Network Poroelasticity Model with Medical Applications

The quasi-static multiple network poroelastic theory (MPET) model, first introduced in the context of geomechanics, has recently found new applications in medicine. In practice, the parameters in the MPET equations can vary over several orders of magnitude which makes their stable discretization and...

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Bibliographic Details
Published in:arXiv.org 2022-05
Main Authors: Kraus, Johannes, Lederer, Philip L, Lymbery, Maria, Osthues, Kevin, Schöberl, Joachim
Format: Article
Language:English
Subjects:
Algorithms
Galerkin method
Geomechanics
Mathematical models
Parameter robustness
Poroelasticity
Robustness (mathematics)
Stability analysis
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Summary:The quasi-static multiple network poroelastic theory (MPET) model, first introduced in the context of geomechanics, has recently found new applications in medicine. In practice, the parameters in the MPET equations can vary over several orders of magnitude which makes their stable discretization and fast solution a challenging task. Here, a new efficient parameter-robust hybridized discontinuous Galerkin method, which also features fluid mass conservation, is proposed for the MPET model. Its stability analysis which is crucial for the well-posedness of the discrete problem is performed and cost-efficient fast parameter-robust preconditioners are derived. We present a series of numerical computations for a 4-network MPET model of a human brain which support the performance of the new algorithms.
ISSN:2331-8422