Iterative least squares methods for solving over-determined matrix for mixed boundary element method

Authors
Ramsak, M Skerget, L
Citation
M. Ramsak et L. Skerget, Iterative least squares methods for solving over-determined matrix for mixed boundary element method, Z ANG MA ME, 80, 2000, pp. S657-S658
Citations number
6
Categorie Soggetti
Mechanical Engineering
Journal title
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
ISSN journal
00442267 → ACNP
Volume
80
Year of publication
2000
Supplement
3
Pages
S657 - S658
Database
ISI
SICI code
0044-2267(2000)80:<S657:ILSMFS>2.0.ZU;2-9
Abstract
Due to the use of the mixed boundary elements in viscous flow computation u sing the Boundary-Domain Integral Method with the Subdomain Technique the f inal discretised matrix system is large, sparse and over-determined. The ge neral least squares method for dense matrices demands large memory and CPU resources. As an alternative, an iterative least squares method with diagon al preconditioning is used. The velocity profiles computed with this, FEM a nd FVM are compared to benchmark valves for a driven cavity Re = 1000.