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

On the Extension of Compressible Flow Solvers to Incompressible Flows

Rossow, C.-C. (2000) On the Extension of Compressible Flow Solvers to Incompressible Flows. ICASE Colloquium, Hampton (usa), 16.09.2000.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

An alternative method to low speed preconditioning for the computation of nearly incompressible flows with compressible methods is developed. For this approach the leading terms of the Flux Difference Splitting approximate Riemann solver are analyzed in the incompressible limit. In combination with the requirement of the velocity field to be divergence-free, an elliptic equation to solve for a pressure correction to enforce the divergence-free velocity field on the discrete level is derived. The pressure correction equation established is shown to be equivalent to classical methods for incompressible flows. However, in the derivation presented here, no heuristic arguments are required, but the discrete method arises consistently from the compressible formulation. In order to allow the computation of flows at all speeds, a blending technique for the transition from the incompressible, pressure based formulation to the compressible, density based formulation is established. As a guidance for this blending technique, again the approximate solution of the Riemann problem is used. Compared with standard preconditioning techniques, the pressure correction method developed here showed improved robustness for high lift flows close to separation.

Dokumentart:Konferenzbeitrag (Vortrag)
Zusätzliche Informationen: LIDO-Berichtsjahr=2001,
Titel:On the Extension of Compressible Flow Solvers to Incompressible Flows
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Rossow, C.-C.NICHT SPEZIFIZIERT
Datum:2000
Status:veröffentlicht
Stichwörter:Navier-Stokes equations, density and pressure based schemes, compressible and incompressible flows
Veranstaltungstitel:ICASE Colloquium, Hampton (usa), 16.09.2000
Veranstalter :NASA Langley Research Center
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ST - Starrflüglertechnologien
DLR - Teilgebiet (Projekt, Vorhaben):L - Konzepte & Integration
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.