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AMG in TAU: Adjoint Equations and Mesh Deformation

Förster, Malte and Pal, Anna (2013) AMG in TAU: Adjoint Equations and Mesh Deformation. In: Computational Flight Testing Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 123. Springer Verlag Berlin Heidelberg. pp. 1-15. ISBN 978-3-642-38876-7. ISSN 1612-2909

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Dealing with aerodynamic and aeroelastic tasks typically involves large and ill conditioned linear systems of equations. Usually the solution of these equations is a time critical component of the overall simulation. While common one-level solution techniques tend to be rather inefficient, the appliance of a hierarchical method like algebraic multigrid (AMG) seems to be more promising in order to deal with the increasing demands for the linear solver. However, due to various sources of stiffness within the discretized problem, applying AMG in a straight-forward way is not always possible. In the context of ComFliTe, the usage of classical AMG was evaluated for mesh deformation applications based on linear elasticity. For the solution of flow adjoint equations new and more sophisticated AMG methods were developed. All approaches have been integrated into the state-of-the-art linear solver library SAMG. The following resport describes the modified algorithms utilizing AMG and summarizes the results obtained within the DLR simulation codes throughout the project.

Item URL in elib:https://elib.dlr.de/84747/
Document Type:Contribution to a Collection
Title:AMG in TAU: Adjoint Equations and Mesh Deformation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Förster, Maltemalte.foerster (at) scai.fraunhofer.deUNSPECIFIED
Pal, Annaanna.pal (at) dlr.deUNSPECIFIED
Journal or Publication Title:Computational Flight Testing
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-15
Kroll, Norbertnorbert.kroll@dlr.de
Radespiel, RolfTU Braunschweig
van der Burg, Jan-WillemAirbus GmbH, Bremen
Sørensen, KaareCassidian, Manching, Deutschland
Publisher:Springer Verlag Berlin Heidelberg
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:Algebraic Multigrid, simulation, linear solver
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Seyfried, Beate
Deposited On:18 Oct 2013 14:09
Last Modified:22 Jan 2018 16:50

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