<div class="csl-bib-body">
<div class="csl-entry">Lechner, C., Koch, M., Tervo, M., & Mettin, R. (2024, November 5). <i>Dynamics of acoustically excited bubbles close to a solid wall</i> [Conference Presentation]. Fünftes Kolloquium Kavitation und Kavitationserosion, Bochum, Germany. http://hdl.handle.net/20.500.12708/208247</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/208247
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dc.description.abstract
We numercially investigate the oscillation of air filled bubbles in water that are excited by an acoustic field. A bubble is placed at or close to a plane solid wall and exposed to a sinusoidal pressure variation. Frequencies of the acoustic field in the ultra sound range, f >= 20 kHz, and pressure amplitudes of up to 1 bar are considered. Bubble sizes range from O(10) to O(100) mum. Expansion and collapse of the bubble are investigated by solving the compressible Navier-Stokes equations discretized with the finite volume method. The volume of fluid method is used to capture the
interface between liquid and gas. The model is implemented in the open source software package OpenFOAM.
Numerical results show, that the dynamics of acoustically excited bubbles is rich. Depending on the parameters, jets form by involution of the bubble wall or after liquid self-impact at the axis. During rebounds, jets away from the wall are observed.
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dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.subject
bubble
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dc.subject
oscillation
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dc.subject
acoustic excitation
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dc.subject
ultra sound
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dc.subject
jet formation
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dc.subject
OpenFOAM
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dc.title
Dynamics of acoustically excited bubbles close to a solid wall
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dc.type
Presentation
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dc.type
Vortrag
de
dc.contributor.affiliation
University of Göttingen, Germany
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dc.contributor.affiliation
University of Göttingen, Germany
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dc.contributor.affiliation
University of Göttingen, Germany
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dc.relation.grantno
I5349-N
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dc.type.category
Conference Presentation
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tuw.project.title
Komplexe Dynamik von Kavitationsblasen an Objekten
