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Quantification and Reduction of Numerical Uncertainties by Improvement of the TAU Grid Adaptation Tool and Adjoint Methods

Orlt, Matthias and Gauger, Nicolas (2013) Quantification and Reduction of Numerical Uncertainties by Improvement of the TAU Grid Adaptation Tool and Adjoint Methods. In: Management and Minimisation of Uncertainties and Errors in Numerical Aerodynamics Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol. 122. Springer-Verlag Berlin Heidelberg. pp. 29-53. ISBN 978-3-642-36184-5. ISSN 1612-2909

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Official URL: http://link.springer.com/chapter/10.1007/978-3-642-36185-2_2

Abstract

Within the framework of the project MUNA, several enhancements of the grid adaptation tool of the DLR TAU Code were prepared, implemented and tested. Therefore, various quality aspects of the single elements of the computational grid were investigated and used to modify the adapted grids. Conditions for the decomposability of the elements are evaluated and used for a more accurate compliance of the point density with the requirement of the error indicator in the grid refinement. Geometrical element quality terms for the element types of the TAU Code are derived from the known mean-ratio element quality measure for a simplex and used to avoid the worst shaped elements in an adapted grid. In addition, the TAU adaptation was extended to use the sensors provided by the adjoint solver of TAU as an error indicator for a goal orientated grid adaptation. The results are compared to that of a simple differences-based grid adaptation. Furthermore, the adjoint method was used for the efficient quantification of uncertainties in the aerodynamic coefficients caused by variations of the parameters of the SAE and the Wilcox-k-ω turbulence model.

Item URL in elib:https://elib.dlr.de/83936/
Document Type:Contribution to a Collection
Additional Information:Book Subtitle: Results of the German collaborative project MUNA; DOI: 10.1007/978-3-642-36185-2_2; Online ISBN: 978-3-642-36185-2
Title:Quantification and Reduction of Numerical Uncertainties by Improvement of the TAU Grid Adaptation Tool and Adjoint Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Orlt, MatthiasUNSPECIFIEDUNSPECIFIED
Gauger, Nicolasnicolas.gauger (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Management and Minimisation of Uncertainties and Errors in Numerical Aerodynamics
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 122
Page Range:pp. 29-53
Editors:
EditorsEmail
Eisfeld, BernhardUNSPECIFIED
Barnewitz, HolgerAirbus Operations GmbH
Fritz, WillyEADS Deutschland GmbH Cassidian
Thiele, FrankUNSPECIFIED
Publisher:Springer-Verlag Berlin Heidelberg
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-642-36184-5
Status:Published
Keywords:MUNA, DLR TAU Code, aerodynamic coefficients, Numerical Uncertainties
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 , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Micknaus, Ilka
Deposited On:28 Aug 2013 15:47
Last Modified:22 Jan 2018 16:50

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