<div class="csl-bib-body">
<div class="csl-entry">Koch, M., Lechner, C., Lauterborn, W., & Mettin, R. (2022, November). <i>Mushroom shaped bubbles and the fast jet</i> [Conference Presentation]. 4th Colloquium on Cavitation and Cavitation Erosion, Duisburg, Germany. http://hdl.handle.net/20.500.12708/154038</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/154038
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dc.description.abstract
The dynamics of a single, laser-induced cavitation bubble on
top of a solid cylinder is studied both
experimentally and numerically. When the bubble is
generated close to the flat top along the axis of the
cylinder and its maximum radius exceeds the one of
the flat top surface, it collapses in the form of a mushroom
with a footing on the cylinder, a long stem and a
hat-like cap typical for a mushroom head. The head
may collapse forming a fast jet into the
stem, depending on bubble size and bubble distance
to the top of the cylinder. The parameter space of
initial distance to the cylinder, bubble size and cylinder
radius is scanned numerically, partly compared
to experiments [1,2] and evaluated for the resulting jet velocity
and jet length and other features. The results
represent a contribution to understand the behavior
of bubbles collapsing close to structured surfaces, in
particular, how thin, fast jets are generated. An indication
how the fast jet plays a role for erosion is given, as well.
[1] M. Koch, J. M. Rosselló, C. Lechner, W. Lauterborn and R. Mettin. “Dynamics of a laser-induced bubble above the flat top
of a solid cylinder — mushroom-shaped bubbles and the fast jet”. In: Fluids 7.1 (2022).
[2] E. Kadivar, T.-H. Phan, W.-G. Park and O. el Moctar. "Dynamics of a single cavitation bubble near a cylindrical rod". In: Phys. Fluids 33, 113315 (2021)
en
dc.description.sponsorship
Fonds zur Förderung der wissenschaftlichen Forschung (FWF)
