References of "Kurowski, Pascal"
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See detailBubble splitting in oscillatory flows on ground and in reduced gravity
Yoshikawa, Harunori; Zoueshtiagh, Farzam; Caps, Hervé ULg et al

in European Physical Journal E -- Soft Matter (2010), 31

The stability of centimeter scale air bubbles is studied in quiescent suspending liquid under an imposed oscillatory acceleration field. Experiments were performed in reduced- and normal-gravity ... [more ▼]

The stability of centimeter scale air bubbles is studied in quiescent suspending liquid under an imposed oscillatory acceleration field. Experiments were performed in reduced- and normal-gravity environments. A strong acceleration resulted in an instability leading to the breakups of the bubbles in both gravity environments. The breakup onset was investigated and found to be characterized by a critical acceleration acr . The influence of the liquid viscosity and the gravitational environment was studied. Empirical correlations for the onset are presented and discussed with the intention to reveal splitting mechanism. The inertial mechanism often deemed to cause the breakup of drops sub jected to a rapid gas stream is shown to give explanations consistent with the experiments. A breakup criterion for both gravitational environments is proposed through discussions from an energetic point of view. [less ▲]

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See detailBubble rupture in a vibrated liquid under microgravity
Yoshikawa, Harunori; Zoueshtiagh, Farzam; Caps, Hervé ULg et al

in Microgravity Science and Technology (2007), 19

The response of an air bubble surrounded by a liquid in a sealed cell submitted to vibrations was investigated experimentally under microgravity conditions and compared to experiments under normal gravity ... [more ▼]

The response of an air bubble surrounded by a liquid in a sealed cell submitted to vibrations was investigated experimentally under microgravity conditions and compared to experiments under normal gravity conditions. As in normal gravity [1], it was observed that the bubble split into smaller parts when the acceleration of the vibrations reached a threshold. This threshold in microgravity is substantially smaller than that in normal gravity. Experimental results will be presented in terms of an acceleration based Bond number which has been found to characterize the bubble behaviour in the laboratory experiments [1]. Introduction [less ▲]

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