CHEGINI, Fatemeh; FROEHLY, Algiane; HUYNH, Ngoc; PAVARINO, Luca F.; POTSE, Mark; SCACCHI, Simone; WEISER, Martin

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Licencia de uso del documento

CHEGINI, Fatemeh
Zuse Institute Berlin [ZIB]

FROEHLY, Algiane
Service Expérimentation et Développement [Bordeaux] [SED]

HUYNH, Ngoc
Università degli Studi di Pavia = University of Pavia [UNIPV]

Idioma

Communication dans un congrès

Este ítem está publicado en

COUPLED 2023 - 10th International Conference on Computational Methods for Coupled Problems in Science and Engineering, 2023-06-05, Chania.

Resumen en inglés

The cardiac extracellular-membrane-intracellular (EMI) model enables the precise geometrical representation and resolution of aggregates of individual myocytes. As a result, it not only yields more accurate simulations of cardiac excitation compared to homogenized models but also presents the challenge of solving much larger problems. In this paper, we introduce recent advancements in three key areas: (i) the creation of artificial, yet realistic grids, (ii) efficient higher-order time stepping achieved by combining low-overhead spatial adaptivity on the algebraic level with progressive spectral deferred correction methods, and (iii) substructuring domain decomposition preconditioners tailored to address the complexities of heterogeneous problem structures. The efficiency gains of these proposed methods are demonstrated through numerical results on cardiac meshes of different sizes.< Leer menos

Palabras clave en inglés

EMI model

high-order time integration

spectral deferred correction

algebraic adaptivity

multirate integration scheme

ladder methods

BDDC preconditioner

URI

https://oskar-bordeaux.fr/handle/20.500.12278/190278

Proyecto europeo

Numerical modeling of cardiac electrophysiology at the cellular scale

Orígen

Importado de Hal

Centros de investigación

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251