Large Bubbles in Vibrated Liquid Are Levitated by Wall Motions - Oct. 2020
SAND Number: SAND2020-10007 V Authors/Presenters: John R. Torczynski, Timothy P. Koehler Content Owner: John R. Torczynski Asset Content Description: Experiments have shown that, if a thin slab of liquid confined between vertical transparent walls is vibrated vertically, a large bubble can be stably levitated between the free surface and the bottom [O’Hern et al., “Bubble Oscillations and Motion Under Vibration,” Physics of Fluids 24, 091108 (2012)]. At that time, bubble levitation and stability could not be explained because the downward Bjerknes force is too weak to overcome the upward buoyancy force. However, if wall flexibility is taken into account, the pressure-induced lateral oscillations of the walls lead to a resonance that increases the Bjerknes force. Below resonance, bubbles are driven to the bottom. Above resonance, bubbles are driven to the region of the levitated bubble. Subject area/Keywords: bubble, vibration, wall POC: John Torczynski 01513 (505) 845-8991 Import
8551-1 Digital Media Operations
10/22/2020 7:34:10 PM

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