Minimum size for the top jet drop from a bursting bubble

Brasz, C. Frederik; Bartlett, Casey; Walls, Peter; Flynn, Elena; Yu, Yingxian Estella; Bird, James

doi:10.1103/physrevfluids.3.074001

Cited by 74 publications

(91 citation statements)

References 44 publications

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“…The large difference in r i between the droplets generated in regions I and II is likely associated with the mechanisms by which the droplets are generated. From the LIF movies, it appears that the small bubble popping later in the process (region II) looks at least similar to popping events found in experiments with single small bubbles in quiescent tanks of water (see, e.g., Cipriano & Blanchard, ; Kientzler et al, ; Gañán Calvo, ; Deike et al, ; Brasz et al, ; Spiel, ; ; Resch, ; Resch & Afeti, ) though the large number of bubbles and the decaying underlying turbulent flow seem to complicate the process. However, the larger bubbles from the first plunging event that burst in region I appear to be quite different.…”

Section: Discussionsupporting

confidence: 64%

Spray Generation by a Plunging Breaker

Erinin

Wang

Liu

et al. 2019

Geophysical Research Letters

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An experimental investigation of droplet generation by a plunging breaking wave is presented. In this work, simultaneous measurements of the wave crest profile evolution and of droplets ranging in radius down to 50 μm for a mechanically generated plunging breaker during many repeated breaking events in freshwater are performed. We find three distinct time zones of droplet production, first when the jet impacts the free surface upstream of the wave crest, second when the large air bubbles entrapped by the plunging jet impact reach the free surface and burst, and third when smaller bubbles burst upon reaching the free surface later in the breaking process. These subprocesses account for 22%, 44%, and 34%, respectively, of the average of 653 droplets produced per breaking event. The probability distributions of the ranges of large and small droplet radii are well represented by power law functions that intersect at a radius of 418 μm.

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Section: Discussionsupporting

confidence: 64%

Spray Generation by a Plunging Breaker

Erinin

Wang

Liu

et al. 2019

Geophysical Research Letters

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“…The smallest singular dimple width is here 12 μm which is similar to the 15 μm observed by Thoroddsen et al (2018), who used a liquid which is an order of magnitude more viscous. This suggests that a viscous cutoff is not at play for the much lower viscosity of our PP1 drop (Castrejón-Pita et al 2015;Brasz et al 2018a). We can speculate that cavitation or vortex-shedding instability (Thoraval et al 2012) in the cusp at the base of the jet prevents smaller jet sizes, as we see by the micro-bubbles shed at the base of the jet in figure 5(b).…”

Section: Discussionmentioning

confidence: 60%

Multitude of dimple shapes can produce singular jets during the collapse of immiscible drop-impact craters

2020

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“…However, identifying the critical Oh 1 does not resolve the dependency that both the this work, another paper [19] has discussed the minimum size of the drops ejected, which is also contemplated here for completeness.…”

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confidence: 94%

Scaling laws of top jet drop size and speed from bubble bursting including gravity and inviscid limit

Gañán‐Calvo

2018

Phys. Rev. Fluids

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Jet droplets from bubble bursting are determined by a limited parametrical space: the liquid properties (surface tension, viscosity, and density), mother bubble size and acceleration of gravity. Thus, the two resulting parameters from dimensional analysis (usually, the Ohnesorge and Bond numbers, Oh and Bo) completely define this phenomenon when both the trapped gas in the bubble and the environment gas have negligible density. A detailed physical description of the ejection process to model both the ejected droplet radius and its initial launch speed is provided, leading to a scaling law including both Oh and Bo. Two critical values of Oh determine two limiting situations: one (Oh 1 =0.038) is the critical value for which the ejected droplet size is minimum and the ejection speed maximum, and the other (Oh 2 =0.0045) is a new critical value which signals when viscous effects vanish. Gravity effects (Bo) are consistently introduced from energy conservation principles. The proposed scaling laws produce a remarkable collapse of published experimental measurements collected for both the ejected droplet radius and ejection speed. * amgc@us.es 1 arXiv:1806.04199v2 [physics.flu-dyn]

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Minimum size for the top jet drop from a bursting bubble

Cited by 74 publications

References 44 publications

Spray Generation by a Plunging Breaker

Spray Generation by a Plunging Breaker

Multitude of dimple shapes can produce singular jets during the collapse of immiscible drop-impact craters

Scaling laws of top jet drop size and speed from bubble bursting including gravity and inviscid limit

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