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Scalable Two-Level Preconditioners for CFD Computations on Many-Core Systems

Basermann, Achim and Zöllner, Melven (2012) Scalable Two-Level Preconditioners for CFD Computations on Many-Core Systems. PMAA 2012, 28.-30. Juni 2012, London, England.

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Abstract

At the German Aerospace Center (DLR), the parallel simulation systems TAU and TRACE have been developed for the aerodynamic design of aircrafts or turbines for jet engines. Large-scale computing resources allow more detailed numerical investigations with bigger numerical configurations. Up to 50 million grid points in a single simulation are becoming a standard configuration in the industrial design. Both CFD solvers, TAU and TRACE, require the parallel solution of large, sparse real or complex systems of linear equations. For the parallel iterative solution of these equation systems, various block-local preconditioners are compared with a global two-level incomplete factorization preconditioning method for real or complex matrix problems. The two-level preconditioner is based on an improved distributed Schur complement ansatz. Compared with the original Schur complement method, it significantly saves incomplete factorization operations. Numerical, performance and scalability results of preconditioned FGMRes algorithms are presented for typical TAU and TRACE problems from external or internal flow simulations on many-core systems.

Item URL in elib:https://elib.dlr.de/79340/
Document Type:Conference or Workshop Item (Speech)
Title:Scalable Two-Level Preconditioners for CFD Computations on Many-Core Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Basermann, AchimDLR-KP, SC-VSSUNSPECIFIED
Zöllner, MelvenRWTH AachenUNSPECIFIED
Date:28 June 2012
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Parallel iterative solvers; two-level preconditioners; Schur complement; CFD; many-core systems
Event Title:PMAA 2012
Event Location:London, England
Event Type:international Conference
Event Dates:28.-30. Juni 2012
Organizer:Birkbeck University of London; ERCIM; IMACS; Elsevier Science
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben SISTEC
Location: Köln-Porz
Institutes and Institutions:Institut of Simulation and Software Technology > Distributed Systems and Component Software
Institut of Simulation and Software Technology
Deposited By: Basermann, Dr.-Ing. Achim
Deposited On:13 Dec 2012 16:05
Last Modified:31 Jul 2019 19:38

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