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Towards Adaptive Mesh Refinement for the Spectral Element Solver Nek5000
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1724-0188
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-7448-3290
Argonne National Laboratory.
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2019 (English)In: Direct and Large-Eddy Simulation XI, Springer, 2019, 25, p. 9-15Chapter in book (Refereed)
Abstract [en]

Hypre, a library for linear algebra, is used to replace a Matlab code for performing the setup step of an Algebraic Multigrid Method (AMG). The AMG method is used to compute part of the preconditioner in Nek5000, a code for Computational Fluid Dynamics based on the spectral element method. However, the solution of the AMG problem is not performed via Hypre but by Nek5000’s internal solver. The new AMG setup is shown to be faster by at least one order of magnitude, while it does not significantly impact the efficiency of the AMG solver, as is shown from its application to relevant test cases.

Place, publisher, year, edition, pages
Springer, 2019, 25. p. 9-15
Series
ERCOFTAC Series, ISSN 1382-4309, E-ISSN 2215-1826 ; 25
Keywords [en]
algebraic multigrid method, preconditioner
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-251628DOI: 10.1007/978-3-030-04915-7_2Scopus ID: 2-s2.0-85061343618ISBN: 978-3-030-04915-7 (electronic)OAI: oai:DiVA.org:kth-251628DiVA, id: diva2:1316156
Conference
Direct and Large-Eddy Simulation XI
Note

QC 20190819

Available from: 2019-05-16 Created: 2019-05-16 Last updated: 2019-10-09Bibliographically approved

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Publisher's full textScopushttps://link.springer.com/chapter/10.1007/978-3-030-04915-7_2

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Peplinski, Adam

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