Fiedler, Jens and 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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Abstract
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.
Item URL in elib: | https://elib.dlr.de/90285/ | |||||||||
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Document Type: | Conference or Workshop Item (Speech) | |||||||||
Title: | Low-Mach preconditioned boundary conditions for compressible solvers | |||||||||
Authors: |
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Date: | July 2014 | |||||||||
Refereed publication: | Yes | |||||||||
Open Access: | Yes | |||||||||
Gold Open Access: | No | |||||||||
In SCOPUS: | No | |||||||||
In ISI Web of Science: | No | |||||||||
Status: | Published | |||||||||
Keywords: | Low-Mach precondition, compressible flows, preconditioned boundary conditions | |||||||||
Event Title: | 6th. European Conference on Computational Fluid Dynamics | |||||||||
Event Location: | Barcelona, Spanien | |||||||||
Event Type: | international Conference | |||||||||
Event Dates: | 20.-25. Juli 2014 | |||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||
HGF - Program: | Aeronautics | |||||||||
HGF - Program Themes: | propulsion systems | |||||||||
DLR - Research area: | Aeronautics | |||||||||
DLR - Program: | L ER - Engine Research | |||||||||
DLR - Research theme (Project): | L - Virtual Engine and Validation methods (old) | |||||||||
Location: | Köln-Porz | |||||||||
Institutes and Institutions: | Institute of Propulsion Technology > Numerical Methodes | |||||||||
Deposited By: | Fiedler, Jens | |||||||||
Deposited On: | 18 Aug 2014 10:42 | |||||||||
Last Modified: | 31 Jul 2019 19:47 |
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