Friedrich, Jonas ; Schäfer, Michael (2019)
Acoustics simulation in the presence of moving interfaces in multiphase flows.
6th European Conference on Computational Mechanics (ECCM 6) / 7th European Conference on Computational Fluid Dynamics (ECFD 7). Glasgow, UK (11.06.2018-15.06.2018)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Numerical simulations can help to understand the mechanisms of sound producing sources. In this work a numerical scheme for calculating surface tension dominated multiphase flows coupled with acoustics is presented. The Volume-of-Fluid (VOF) method is used to calculate the incompressible multiphase flow. Surface tension is taken into account by the Continuum Surface Force (CSF) method. An Expansion about Incompressible Flow (EIF) approach using the Linearized Euler Equations (LEE) is employed for the acoustics. The LEE are valid in each phase independently of the material parameters, but not at the interface. When the interface moves, unphysical acoustic sources arise. An approach which suppresses the sources in the interface region is applied. Comparing the new approach with the unchanged LEE in a moving drop test case, it is shown that the parasitic sound vanishes. An elliptic drop oscillating in a resting background flow serves as a second test case, in which the moving interface has to produce sound. A good agreement under 2.5% between the frequencies of the oscillation and the acoustic pressure emitted by the drop is achieved.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Friedrich, Jonas ; Schäfer, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Acoustics simulation in the presence of moving interfaces in multiphase flows |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Januar 2019 |
| Buchtitel: | Proceedings of 6th European Conference on Computational Mechanics (ECCM 6) / 7th European Conference on Computational Fluid Dynamics (ECFD 7) |
| Veranstaltungstitel: | 6th European Conference on Computational Mechanics (ECCM 6) / 7th European Conference on Computational Fluid Dynamics (ECFD 7) |
| Veranstaltungsort: | Glasgow, UK |
| Veranstaltungsdatum: | 11.06.2018-15.06.2018 |
| URL / URN: | http://congress.cimne.com/eccm_ecfd2018/frontal/docs/Ebook-G... |
| Kurzbeschreibung (Abstract): | Numerical simulations can help to understand the mechanisms of sound producing sources. In this work a numerical scheme for calculating surface tension dominated multiphase flows coupled with acoustics is presented. The Volume-of-Fluid (VOF) method is used to calculate the incompressible multiphase flow. Surface tension is taken into account by the Continuum Surface Force (CSF) method. An Expansion about Incompressible Flow (EIF) approach using the Linearized Euler Equations (LEE) is employed for the acoustics. The LEE are valid in each phase independently of the material parameters, but not at the interface. When the interface moves, unphysical acoustic sources arise. An approach which suppresses the sources in the interface region is applied. Comparing the new approach with the unchanged LEE in a moving drop test case, it is shown that the parasitic sound vanishes. An elliptic drop oscillating in a resting background flow serves as a second test case, in which the moving interface has to produce sound. A good agreement under 2.5% between the frequencies of the oscillation and the acoustic pressure emitted by the drop is achieved. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Numerische Berechnungsverfahren im Maschinenbau (FNB) |
| Hinterlegungsdatum: | 30 Okt 2019 08:11 |
| Letzte Änderung: | 30 Okt 2019 08:11 |
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