未找到相关数据
A COMPARISON OF CONJUGATE-GRADIENT PRECONDITIONINGS FOR 3-DIMENSIONAL PROBLEMS ON A CRAY-1
被引：5
|作者：
KIGHTLEY, JR
JONES, IP
机构：
[1] AERE, Computer Science & Systems, Div, Harwell, Engl, AERE, Computer Science & Systems Div, Harwell, Engl
关键词：
FLOW OF FLUIDS - Turbulent - MATHEMATICAL TECHNIQUES - Numerical Analysis;
D O I：
10.1016/0010-4655(85)90154-7
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ;
0835 ;
摘要：
This paper presents the results of a study of the application of the Preconditioned Conjugate Gradient algorithm to some equations arising in three-dimensional turbulent flow prediction. The merits of several of the standard preconditionings are discussed, and some of the difficulties which are encountered when trying to solve such problems efficiently on a vector computer are described. The results show that the coefficient matrices which arise have important differences from those which derive from many standard test problems. Efficient solution of the problems is still possible, but the correct choice of preconditioning is important. In particular, the application of truncated power series expansions to the preconditioning phase is shown to produce substantial gains.
引用
收藏
页码：205 / 214
页数：10
相关论文