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Low-Mach preconditioned boundary conditions for compressible solvers

Fiedler, Jens und di Mare, Francesca (2014) Low-Mach preconditioned boundary conditions for compressible solvers. 6th. European Conference on Computational Fluid Dynamics, 20.-25. Juli 2014, Barcelona, Spanien.

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Kurzfassung

Approaching the incompressibility limit in CFD applications where compressible, density based solution methods are employed, is accompanied very often not only by slow convergence of the residuals but also by a strong degradation of the solution quality. This issue is particularly severe in turbo-machinery applications, where large variations of flow regimes occur. Low-Mach preconditioning methods can be applied to the Euler- and Navier-Stokes equations to alleviate such difficulties. As noted by several authors, these techniques can cause stability problems especially in proximity of the domain’s boundaries. In particular, it has been demonstrated that an appropriate scaling treatment is also required for characteristic-based boundary conditions. In the current work we present the theoretical development and application of preconditioned impermeable boundaries in combination with preconditioned far-field conditions in the in-house CFD code TRACE.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Low-Mach preconditioned boundary conditions for compressible solvers
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Fiedler, JensDLR, Institute of Propulsion Technology
di Mare, FrancescaDLR, Institute of Propulsion Technology
Datum:Juli 2014
Referierte Publikation:Ja
Status:veröffentlicht
Stichwörter:Low-Mach precondition, compressible flows, preconditioned boundary conditions
Veranstaltungstitel:6th. European Conference on Computational Fluid Dynamics
Veranstaltungsort:Barcelona, Spanien
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:20.-25. Juli 2014
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebssysteme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Engine Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk und Validierungsmethoden
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Numerische Methoden
Hinterlegt von: Jens Fiedler
Hinterlegt am:18 Aug 2014 10:42
Letzte Änderung:18 Aug 2014 10:42

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