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

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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]

Langue

Communication dans un congrès

Ce document a été publié dans

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

Résumé en anglais

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.< Réduire

Mots clés en anglais

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

Projet Européen

Numerical modeling of cardiac electrophysiology at the cellular scale

Origine

Importé de hal

Unités de recherche

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251