Počet záznamů: 1  

Large-scale geosimulations using GEM and trilions

  1. 1.
    0483048 - UGN-S 2019 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
    Blaheta, Radim - Jakl, Ondřej - Hrtus, Rostislav - Kolcun, Alexej - Kohut, Roman - Starý, Jiří - Turan, E.
    Large-scale geosimulations using GEM and trilions.
    Supercomputing in science and engineering. Ostrava: IT4Innovations National Supercomputing Center, 2017 - (Pešatová, K.; Poláková, B.; Cawley, J.), s. 100-103. ISBN 978-80-248-4037-6.
    [Supercomputing in science and engineering. Ostrava (CZ), 15.11.2017-16.11.2017]
    Grant CEP: GA MŠk ED1.1.00/02.0070
    Institucionální podpora: RVO:68145535
    Klíčová slova: singular symmetric positive semidefinite problems * special problems of geotechnics * PCG method
    Kód oboru RIV: BA - Obecná matematika
    Obor OECD: Applied mathematics

    The project deals with efficient solution of singular symmetric positive semidefinite problems. Our motivation arises from the
    need 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.
    Trvalý link: http://hdl.handle.net/11104/0278473