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http://dx.doi.org/10.18419/opus-13076
Autor(en): | Zeifang, Jonas Beck, Andrea |
Titel: | A low Mach number IMEX flux splitting for the level set ghost fluid method |
Erscheinungsdatum: | 2021 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 722-750 |
Erschienen in: | Communications on applied mathematics and computation 5 (2023), S. 722-750 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-130956 http://elib.uni-stuttgart.de/handle/11682/13095 http://dx.doi.org/10.18419/opus-13076 |
ISSN: | 2096-6385 2661-8893 |
Zusammenfassung: | Considering droplet phenomena at low Mach numbers, large differences in the magnitude of the occurring characteristic waves are presented. As acoustic phenomena often play a minor role in such applications, classical explicit schemes which resolve these waves suffer from a very restrictive timestep restriction. In this work, a novel scheme based on a specific level set ghost fluid method and an implicit-explicit (IMEX) flux splitting is proposed to overcome this timestep restriction. A fully implicit narrow band around the sharp phase interface is combined with a splitting of the convective and acoustic phenomena away from the interface. In this part of the domain, the IMEX Runge-Kutta time discretization and the high order discontinuous Galerkin spectral element method are applied to achieve high accuracies in the bulk phases. It is shown that for low Mach numbers a significant gain in computational time can be achieved compared to a fully explicit method. Applications to typical droplet dynamic phenomena validate the proposed method and illustrate its capabilities. |
Enthalten in den Sammlungen: | 06 Fakultät Luft- und Raumfahrttechnik und Geodäsie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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s42967-021-00137-2.pdf | 2,21 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons