Název: Large-scale geosimulations using GEM and trilions
Autoři: Blaheta, Radim ; Jakl, Ondřej ; Hrtus, Rostislav ; Kolcun, Alexej ; Kohut, Roman ; Starý, Jiří ; Turan, E.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Supercomputing in science and engineering, Ostrava (CZ), 20171115
Rok: 2017
Jazyk: eng
Abstrakt: The project deals with efficient solution of singular symmetric positive semidefinite problems. Our motivation arises from the \nneed to solve special problems of geotechnics, e.g. to perform upscaling analysis of geocomposites. In that and other applications we have to solve boundary problems with pure Neumann boundary conditions. We show that the stabilised PCG method with various preconditioners is a good choice for systems resulting from the numerical solution of Neumann problems, or more generally problems with a known small dimensional null space. The work was also taken as an opportunity to compare parallel implementations of the orresponding solvers, namely implementations in the in-house finite element software GEM and implementations employing components of the general Trilinos library. The studies show that the solvers based on GEM are highly competitive with its recognised counterpart.
Klíčová slova: PCG method; singular symmetric positive semidefinite problems; special problems of geotechnics
Číslo projektu: ED1.1.00/02.0070
Poskytovatel projektu: GA MŠk
Zdrojový dokument: Supercomputing in science and engineering, ISBN 978-80-248-4037-6

Instituce: Ústav geoniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na externích webových stránkách.
Externí umístění souboru: https://www.it4i.cz/wp-content/uploads/2017/04/Supercomputing-in-Science-and-Engineering-reduce-preview.pdf
Původní záznam: http://hdl.handle.net/11104/0278473

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-370690


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Věda a výzkum > AV ČR > Ústav geoniky
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