elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

First Investigations on High-Order Discretization Schemes for Finite Volume Methods in Cartesian Grids

Yang, Y. und Pahlke, K. (2000) First Investigations on High-Order Discretization Schemes for Finite Volume Methods in Cartesian Grids. DLR-Interner Bericht. 129-00/10, 50 S.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

Based on a finite-volume method, a spatially fourth-order accurate scheme is proposed for solving the unsteady compressible Euler Equations for subsonic flows on Cartesian background grids in the frame of a Chimera method (Ref [1], [2]). The Chimera grids serve as background grids while curvilinear grids are used close to the solid surface of an airfoil or wing. The basic idea to achieve the high-order accuracy is realized by defining the flow values or flux terms at the interfaces of the control cell with high-order interpolation. Accuracy analysis of the high order discretization schemes is given and compared with the conventional second-order discretization scheme. A dual-time stepping method is used for time integration, thus making these schemes best suited for unsteady problems. To verify the improvement of the fourth-order scheme, a two-dimensional convecting vortex in a uniform stream and 2D BVI effects are simulated. For the 2D BVI simulations, a curvilinear grid with the original second-order scheme is used as a child grid to deal with the realistic solid surface and flow discontinuities in the near flow region. The fourth-order scheme is applied on the Cartesian background grid. The results of the simulations show that the diffusion of the moving vortex is considerably reduced compared to the original second-order discretization scheme.

Dokumentart:Berichtsreihe (DLR-Interner Bericht)
Zusätzliche Informationen: LIDO-Berichtsjahr=2001,
Titel:First Investigations on High-Order Discretization Schemes for Finite Volume Methods in Cartesian Grids
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Yang, Y.NICHT SPEZIFIZIERT
Pahlke, K.NICHT SPEZIFIZIERT
Datum:2000
Seitenanzahl:50
Status:veröffentlicht
Stichwörter:CFD, Euler equations, highly accurate schemes, vortex advection, unsteady flows, Chimera
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Drehflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L RR - Drehflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Der virtuelle Drehflügler
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Institut für Entwurfsaerodynamik
Hinterlegt von: Claudia Grant
Hinterlegt am:16 Sep 2005
Letzte Änderung:14 Jan 2010 20:19

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.