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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. In: Joint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014. 6th. European Conference on Computational Fluid Dynamics, 2014-07-20 - 2014-07-25, 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.

elib-URL des Eintrags:https://elib.dlr.de/90285/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Low-Mach preconditioned boundary conditions for compressible solvers
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Fiedler, JensDLR, Institute of Propulsion TechnologyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
di Mare, FrancescaDLR, Institute of Propulsion TechnologyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juli 2014
Erschienen in:Joint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
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
Veranstaltungsbeginn:20 Juli 2014
Veranstaltungsende: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 (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Numerische Methoden
Hinterlegt von: Fiedler, Jens
Hinterlegt am:18 Aug 2014 10:42
Letzte Änderung:05 Nov 2024 07:40

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