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Titolo:
Coarse grid acceleration of a parallel block preconditioner
Autore:
Vuik, C; Frank, J;
Indirizzi:
Delft Univ Technol, Dept Appl Math Anal, Fac Informat Technol & Syst, NL-2600 GA Delft, Netherlands Delft Univ Technol Delft Netherlands NL-2600 GA00 GA Delft, Netherlands
Titolo Testata:
FUTURE GENERATION COMPUTER SYSTEMS
fascicolo: 8, volume: 17, anno: 2001,
pagine: 933 - 940
SICI:
0167-739X(200106)17:8<933:CGAOAP>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONSYMMETRIC LINEAR-SYSTEMS; NAVIER-STOKES EQUATIONS; CONJUGATE-GRADIENT; DOMAIN DECOMPOSITION; CG; IMPLEMENTATION; COMPUTERS; DEFLATION; GMRES;
Keywords:
parallel Krylov subspace methods; block preconditioner; overlapping subdomains; coarse grid correction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Vuik, C Delft Univ Technol, Dept Appl Math Anal, Fac Informat Technol & Syst, POB 5031, NL-2600 GA Delft, Netherlands Delft Univ Technol POB 5031 Delft Netherlands NL-2600 GA herlands
Citazione:
C. Vuik e J. Frank, "Coarse grid acceleration of a parallel block preconditioner", FUT GENER C, 17(8), 2001, pp. 933-940

Abstract

A block preconditioner is considered in a parallel computing environment. This preconditioner has good parallel properties, however, the convergence deteriorates when the number of blocks increases. Two different techniques are studied to accelerate the convergence: overlapping at the interfaces and using a coarse grid correction. It appears that the latter technique is indeed scalable, so the wall clock time is constant when the number of blocks increases. Furthermore, the method is easily added to an existing solution code. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 09:05:26