Composable LInear Solvers for Multiphysics

TitleComposable LInear Solvers for Multiphysics
Publication TypeConference Paper
Year of Publication2012
AuthorsBrown, J, Knepley, MG, May, DA, McInnes, LCurfman, Smith, BF
Conference Name11th International Symposium on Parallel and Distributed Computing
Date Published06/2012
Conference LocationMunich, Germany
Other NumbersANL/MCS-P2017-0112

The Portable, Extensible Toolkit for Scientific computing (PETSc), which focuses on the scalable solution of problems based on partial differential equations, now incorporates new components that allow full composability of solvers for multiphysics and multilevel methods. Through strong encapsulation, we achieve arbitrary, dynamic composition of hierarchical methods for coupled problems and allow customization of all components in composite solvers. For example, we support block decompositions with nested multigrid as well as multigrid on the fully coupled system with block-decomposed smoothers. This paper provides an overview of PETSc new multiphysics capabilities, which have been used in parallel applications including lithosphere dynamics, subduction and mantle convection, ice sheet dynamics, subsurface reactive flow, fusion, mesoscale materials modeling, and power networks.