摘要
During parallel multigrid computations, the Jocobi components along pseudoboundaries in the block by block relaxations operator become the main source todecrease the numerical efficiency of multigrid. We investigate these decrements indetail for constant coefficients Symmetric Positive Definite elliptic model problemsby error character1stic functions in this paper, then some strategies are gained. Atlast, advection-diffusion problems are addressed.
During parallel multigrid computations, the Jocobi components along pseudoboundaries in the block by block relaxations operator become the main source todecrease the numerical efficiency of multigrid. We investigate these decrements indetail for constant coefficients Symmetric Positive Definite elliptic model problemsby error character1stic functions in this paper, then some strategies are gained. Atlast, advection-diffusion problems are addressed.
出处
《计算数学》
CSCD
北大核心
1999年第1期9-18,共10页
Mathematica Numerica Sinica
基金
国家自然科学基金
863-306高科技计划资助
关键词
拟边界J成份
多重网格算法
并行计算
椭圆型方程
parallel multigrid computations, block by block relaxation operator, Jacobi components, convergence factor
