PRECONDITIONERS FOR HIGH DEGREE ELEMENTS

被引：11
作者：
BARRAGY, E
CAREY, GF
机构：
[1] The University of Texas at Austin, Austin
来源：
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1991年 / 93卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0045-7825(91)90116-N
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present investigation considers element block preconditioners for discretizations employing elements of high degree. Several different element block preconditioners are constructed and compared in numerical studies for a model elliptic problem. For regular grids a 2-level preconditioning scheme is found to work quite well. This consists of a local element preconditioner based on transformation of polynomial basis functions, combined with a simple global preconditioner such as Jacobi diagonal type preconditioning. For grids with non-constant coefficients or highly skewed grids, the block preconditioners described here can be applied instead of Jacobi preconditioning.
引用
收藏
页码：97 / 110
页数：14
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