Interaction and coalescence of large bubbles rising in a thin gap
We present accurate measurements of the relative motion and deformation of two large bubbles released consecutively in a quiescent liquid confined in a thin-gap cell. Though the second bubble injected is smaller, we observed that in all cases it accelerates and catches up with the leading bubble. This acceleration is related to the wake of the leading bubble which also induces significant changes in the width and curvature of the trailing bubble. On the contrary, the velocity of the leading bubble is unaltered during the whole interaction and coalescence process. Shape adaptation of the two bubbles is observed just prior to coalescence. After pinch-off, the liquid film is drained at a constant velocity.
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Sander G. Huisman (edit)
Patricia Ern (add twitter)
Véronique Roig (add twitter)
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Physics - Fluid Dynamics

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09/12/19 06:01PM
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