elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Point and Line Implicit Methods to Improve the Efficiency and Robustness of the DLR Tau Code

Langer, Stefan (2013) Point and Line Implicit Methods to Improve the Efficiency and Robustness of the DLR Tau Code. In: New Results in Numerical and Experimental Fluid Mechanics VIII Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol. 121. Springer Verlag. pp. 419-428. ISBN 978-3-642-35679-7. ISSN 1612-2909

Full text not available from this repository.

Abstract

We present a line implicit preconditioned multistage Runge-Katta method to significantly improve the convergence rate for approximating steady state solutions of high Reynolds number viscous flows. The Runge-Katta method is used as a smoother in the context of an agglomarated multigrid method for unstructured grids. A simplification of a first order approximation to the Jacobian of the residual function is used as a preconditioner. Predetermined lines identifying mesh regions of high cell stretching are exploited to extract the relevant parts of the Jacobian matrix. The lines are identified using an efficient algorithm based on a weighted graph. This has the advantage that high aspect ratio cells are determined everywhere in the mesh, for example also in the wake of a wing.

Item URL in elib:https://elib.dlr.de/82860/
Document Type:Contribution to a Collection
Title:Point and Line Implicit Methods to Improve the Efficiency and Robustness of the DLR Tau Code
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Langer, Stefanstefan.langer (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics VIII
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 121
Page Range:pp. 419-428
Editors:
EditorsEmail
Dillmann, AndreasUNSPECIFIED
Heller, GerdAirbus Deutschland, Germany
Kreplin, Hans-PeterUNSPECIFIED
Nitsche, WolfgangBeechcraft Berlin aviation GmbH, Schönefeld, Germany
Peltzer, InkenBeechcraft aviation GmbH, Schönefeld, Germany
Publisher:Springer Verlag
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-642-35679-7
Status:Published
Keywords:Flow solver, point implicit, line implicit, agglomerated multigrid
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:08 Jul 2013 09:52
Last Modified:27 Feb 2015 11:57

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.