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Article Dans Une Revue Ultrasound in Medicine & Biology Année : 2004

Ultrasound-induced microbubble coalescence

Résumé

We study the interaction of ultrasound contrast agent bubbles coated with a layer of lipids, driven by 0.5 MHz ultrasound. High-speed photography on the sub-microsecond timescale reveals that some bubbles bounce off each other, while other show very fast coalescence during bubble expansion. This fast coalescence cannot be explained by dissipation-limited film drainage rates. We conclude that the lipid shell ruptures upon expansion, exposing clean free bubble interfaces that support plug flow profiles in the film and inertia-limited drainage whose timescales match those of the observed coalescence.
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hal-03193394 , version 1 (09-04-2021)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Michiel Postema, Philippe Marmottant, Charles T. Lancée, Sascha Hilgenfeldt, Nico de Jong. Ultrasound-induced microbubble coalescence. Ultrasound in Medicine & Biology, 2004, 30 (10), pp.1337-1344. ⟨10.1016/j.ultrasmedbio.2004.08.008⟩. ⟨hal-03193394⟩
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