Abstract
Bubble collapse near the liquid-liquid interface was experimentally studied in this paper, and the dynamic evolution of a laser-induced bubble (generation, expansion, and collapse) and the liquid-liquid interface (dent and rebound) were captured by a high-speed shadowgraph system. The effect of the dimensionless distance between the bubble and the interface on the direction of the liquid jet, the direction of bubble migration, and the dynamics of bubble collapse were discussed. The results show that: (1) The jet generated during bubble collapse always directs toward the denser fluid; (2) bubble collapses penetrate the interface when the bubble is close to the interface; (3) three different shapes of the liquid-liquid interface—that is, a mushroom-shaped liquid column, a spike droplet, and a spherical liquid droplet—were observed.
Highlights
The appearance of bubble cavitation has brought many serious hazards, such as the generation of noise [1], the destruction of materials [2,3], and the decline of hydraulic mechanical performance [4].Still, it has provided various benefits as well, for example, medicine [5], petrochemical [6], and emulsion preparation [7]
In thisThe section, we studied thelaser dynamics of bubble collapse in the water near the liquid–liquid interface
In order to study the bubble collapse mechanism, a laser-induced bubble was generated near the the liquid-liquid interface, and the bubble collapse and interface change processes were observed
Summary
The appearance of bubble cavitation has brought many serious hazards, such as the generation of noise [1], the destruction of materials [2,3], and the decline of hydraulic mechanical performance [4]. Still, it has provided various benefits as well, for example, medicine [5], petrochemical [6], and emulsion preparation [7]. A cavitation bubble was generated near the interface through laser pulses, and the effect of dimensionless distance on the bubble collapse was detailed
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