Iterative solution methods
Domain decomposition: parallel multilevel methods for elliptic partial differential equations
Domain decomposition: parallel multilevel methods for elliptic partial differential equations
Mathematical physiology
Matrix analysis and applied linear algebra
Matrix analysis and applied linear algebra
Efficient algebraic solution of reaction-diffusion systems for the cardiac excitation process
Journal of Computational and Applied Mathematics
Iterative Methods for Sparse Linear Systems
Iterative Methods for Sparse Linear Systems
The Mortar Finite Element Method for the Cardiac “Bidomain” Model of Extracellular Potential
Journal of Scientific Computing
Optimal Preconditioning for Raviart--Thomas Mixed Formulation of Second-Order Elliptic Problems
SIAM Journal on Matrix Analysis and Applications
Operator splitting and adaptive mesh refinement for the Luo-Rudy I model
Journal of Computational Physics
The effect of non-optimal bases on the convergence of Krylov subspace methods
Numerische Mathematik
Adaptivity in Space and Time for Reaction-Diffusion Systems in Electrocardiology
SIAM Journal on Scientific Computing
Substructuring Preconditioners for Mortar Discretization of a Degenerate Evolution Problem
Journal of Scientific Computing
Fast Structured AMG Preconditioning for the Bidomain Model in Electrocardiology
SIAM Journal on Scientific Computing
Parallel Algorithms for Fluid-Structure Interaction Problems in Haemodynamics
SIAM Journal on Scientific Computing
SIAM Journal on Scientific Computing
International Journal of High Performance Computing Applications
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The so-called bidomain system is possibly the most complete model for the cardiac bioelectric activity. It consists of a reaction-diffusion system, modeling the intra, extracellular and transmembrane potentials, coupled through a nonlinear reaction term with a stiff system of ordinary differential equations describing the ionic currents through the cellular membrane. In this paper we address the problem of efficiently solving the large linear system arising in the finite element discretization of the bidomain model, when a semiimplicit method in time is employed. We analyze the use of structured algebraic multigrid preconditioners on two major formulations of the model, and report on our numerical experience under different discretization parameters and various discontinuity properties of the conductivity tensors. Our numerical results show that the less exercised formulation provides the best overall performance on a typical simulation of the myocardium excitation process.