Name
Title | ||
|---|---|---|
Chaste: A case study of parallelisation of an open source finite-element solver with applications to computational cardiac electrophysiology simulation |
Abstract | ||
|---|---|---|
The simulation of cardiac electrophysiology is a mature field in computational physiology. Recent advances in medical imaging, high-performance computing and numerical methods mean that computational models of electrical propagation in human heart tissue are ripe for use in patient-specific simulation for diagnosis, for prognosis and for selection of treatment methods. However, in order to move in this direction, it is necessary to make efficient use of modern petascale computing resources.This paper focuses on an existing open source simulation framework (Chaste) and documents work done to improve the parallel scaling on a small range of electrophysiology benchmark problems.These benchmarks involve the numerical solution of the monodomain or bidomain equations via the finite-element method. At the beginning of this study the electrophysiology libraries within Chaste were already enabled to run in parallel and were able to solve for electrical propagation using the monodomain or bidomain equations, but parallel efficiency dropped rapidly when run on more than about 64 processors.Throughout the course of the study, improvements were made to problem definition input; geometric mesh partitioning; finite-element assembly of large, sparse linear systems; problem-specific matrix preconditioning; numerical solution of the linear system; and output of the approximate solution. The consequence of these improvements is that, at the end of the study, Chaste is able to solve a monodomain benchmark problem in close to real time. While some of the improvements made to the parallel Chaste code are specific to cardiac electrophysiology, many of the techniques documented in this paper are generic to the parallel finite-element method in other scientific application areas. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1177/1094342012474997 | IJHPCA |
Keywords | Field | DocType |
open source finite-element solver,parallel scaling,electrophysiology library,parallel efficiency,cardiac electrophysiology,case study,bidomain equation,parallel chaste code,cardiac electrophysiology simulation,electrical propagation,electrophysiology benchmark problem,parallel finite-element method,numerical solution,finite element method | Linear system,Matrix (mathematics),Computer science,Parallel computing,Cardiac electrophysiology,Theoretical computer science,Finite element method,Computational model,Computational science,Petascale computing,Numerical analysis,Scaling | Journal |
Volume | Issue | ISSN |
28 | 1 | 1094-3420 |
Citations | PageRank | References |
1 | 0.44 | 23 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Miguel O. Bernabéu | 1 | 145 | 16.87 |
| James Southern | 2 | 81 | 9.06 |
| Nicholas Wilson | 3 | 1 | 0.44 |
| Peter Strazdins | 4 | 68 | 11.03 |
| Jonathan Cooper | 5 | 17 | 2.68 |
| Joe Pitt-Francis | 6 | 121 | 13.88 |