A Two-Level Preconditioned Conjugate-Gradient Method in Distorted and Structured Grids  

作　　者：Qiaolin He 

机构地区：[1]Deparment of Mathematics,Sichuan University,Chengdu 610064,Sichuan,China

出　　处：《Advances in Applied Mathematics and Mechanics》2012年第2期238-249,共12页应用数学与力学进展（英文）

基　　金：The work is partially supported by Youth Foundation of Sichuan University No 2010SCU11072;Doctoral Fund of Ministry of Education of China No 20110181120090.

摘　　要：In this paper,we propose a new two-level preconditioned C-G method which uses the quadratic smoothing and the linear correction in distorted but topologically structured grid.The CPU time of this method is less than that of the multigrid preconditioned C-G method(MGCG)using the quadratic element,but their accuracy is almost the same.Numerical experiments and eigenvalue analysis are given and the results show that the proposed two-level preconditioned method is efficient.

关 键 词：PRECONDITION conjugate gradient MULTIGRID finite element 

分 类 号：O24[理学—计算数学]