PUMA
Istituto di Matematica Applicata e Tecnologie Informatiche     
Arioli M., Manzini G. Null space algorithm and spanning trees in solving Darcy's equation. Preprint ercim.cnr.ian//2002-1312, 2002.
 
 
Abstract
(English)
A Null Space algorithm is considered to solve the augmented system produced by the mixed finite element approximation of Darcy's Law. The method is based on the combination of a emph{LU} factorization technique for sparse matrices with an iterative Krylov solver. The computational efficiency of the method relies on the use of spanning trees to compute the emph{LU} factorization without fill-in and on a suitable stopping criterion for the iterative solver. We experimentally investigate its performance on a realistic set of selected application problems.
Subject Augmented Systems, Sparse Matrices, Mixed Finite Elements
65F05
65F10
65F50


Icona documento 1) Download Document PDF


Icona documento Open access Icona documento Restricted Icona documento Private

 


Per ulteriori informazioni, contattare: Librarian http://puma.isti.cnr.it

Valid HTML 4.0 Transitional