LDRD Final Report-New Directions for Algebraic Multigrid: Solutions for Large Scale Multiphysics Problems

[摘要] The purpose of this research project was to investigate, design, and implement new algebraic multigrid (AMG) algorithms to enable the effective use of AMG in large-scale multiphysics simulation codes. These problems are extremely large; storage requirements and excessive run-time make direct solvers infeasible. The problems are highly ill-conditioned, so that existing iterative solvers either fail or converge very slowly. While existing AMG algorithms have been shown to be robust and stable for a large class of problems, there are certain problems of great interest to the Laboratory for which no effective algorithm existed prior to this research.

[发布日期] 2003-02-06 [发布机构] Lawrence Livermore National Laboratory

[关键词] 99 General And Miscellaneous//Mathematics, Computing, And Information Science;Computerized Simulation;Computer Calculations;Physics;Algorithms