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Bubble nucleation from micro-crevices in a shear flow

Groß, T. F. ; Bauer, J. ; Ludwig, G. ; Fernandez Rivas, D. ; Pelz, P. F. (2018)
Bubble nucleation from micro-crevices in a shear flow.
In: Experiments in Fluids, 59 (1)
doi: 10.1007/s00348-017-2459-y
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The formation of gas bubbles at gas cavities located in walls bounding the flow occurs in many technical applications, but is usually hard to observe. Even though, the presence of a fluid flow undoubtedly affects the formation of bubbles, there are very few studies that take this fact into account. In the present paper new experimental results on bubble formation (diffusion-driven nucleation) from surface nuclei in a shear flow are presented. The observed gas-filled cavities are micrometre-sized blind holes etched in silicon substrates. We measure the frequency of bubble generation (nucleation rate), the size of the detaching bubbles and analyse the growth of the surface nuclei. The experimental findings support an extended understanding of bubble formation as a self-excited cyclic process and can serve as validation data for analytical and numerical models.

Typ des Eintrags: Artikel
Erschienen: 2018
Autor(en): Groß, T. F. ; Bauer, J. ; Ludwig, G. ; Fernandez Rivas, D. ; Pelz, P. F.
Art des Eintrags: Bibliographie
Titel: Bubble nucleation from micro-crevices in a shear flow
Sprache: Englisch
Publikationsjahr: Januar 2018
Verlag: Springer
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Experiments in Fluids
Jahrgang/Volume einer Zeitschrift: 59
(Heft-)Nummer: 1
DOI: 10.1007/s00348-017-2459-y
URL / URN: https://doi.org/10.1007/s00348-017-2459-y
Kurzbeschreibung (Abstract):

The formation of gas bubbles at gas cavities located in walls bounding the flow occurs in many technical applications, but is usually hard to observe. Even though, the presence of a fluid flow undoubtedly affects the formation of bubbles, there are very few studies that take this fact into account. In the present paper new experimental results on bubble formation (diffusion-driven nucleation) from surface nuclei in a shear flow are presented. The observed gas-filled cavities are micrometre-sized blind holes etched in silicon substrates. We measure the frequency of bubble generation (nucleation rate), the size of the detaching bubbles and analyse the growth of the surface nuclei. The experimental findings support an extended understanding of bubble formation as a self-excited cyclic process and can serve as validation data for analytical and numerical models.

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006)
16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006) > Kavitation und generische Strömungen in Turbomaschinen
Profilbereiche
Profilbereiche > Thermo-Fluids & Interfaces
Hinterlegungsdatum: 12 Dez 2017 15:41
Letzte Änderung: 07 Dez 2023 08:37
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