Giant Condensation Nuclei from Bursting Bubbles

Woodcock, A. H.; Kientzler, C. F.; Arons, A. B.; Blanchard, Duncan C.

doi:10.1038/1721144a0

Cited by 154 publications

(76 citation statements)

References 2 publications

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“…This capillary retraction dynamics has been extensively described in the past [21,39,40]. These collapsing waves give rise to the vertical jet shooting out above the free surface as observed on the last columns.…”

Section: Qualitative Studymentioning

confidence: 98%

Jet dynamics post drop impact on a deep pool

2017

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We investigate experimentally the jet formed by the collapse of a cavity created by the impact of a drop on a pool of the same aqueous liquid. We show that jets can emerge with very different shapes and velocities, depending on the impact parameters, thus generating droplets with various initial sizes and velocities. After presenting the jet velocity and top drop radius variation as a function of the impact parameters, we discuss the influence of the liquid parameters on the jet velocity. This allows us to define two different regimes: the singular jet and the cavity jet regimes, where the mechanisms leading to the cavity retraction and subsequent jet dynamics are drastically different. In particular, we demonstrate that in the first regime, a singular capillary wave collapse sparks the whole jet dynamics, making the jet's fast, thin, liquid parameters dependent and barely reproducible. On the contrary, in the cavity jet regime, defined for higher impact Froude numbers, the jets are fat and slow. We show that jet velocity is simply proportional to the capillary velocity √ γ /ρ l D d , where γ is the liquid surface tension, ρ l the liquid density, and D d the impacting drop diameter, and it is in particular independent of viscosity, impact velocity, and gravity, even though the cavity is larger than the capillary length. Finally, we demonstrate that capillary wave collapse and cavity retraction are correlated in the singular regime and decorrelated in the cavity jet regime.

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Section: Qualitative Studymentioning

confidence: 98%

Jet dynamics post drop impact on a deep pool

2017

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“…Since the first photographic investigation published about fifty years ago [13], numerous experiments have been conducted with single bubbles collapsing at a free surface. But, to the best of our knowledge, and surprising as it may seem, no results concerning the collateral effects on adjoining bubbles of bubbles collapsing in a bubble monolayer have been reported up to now.…”

Section: MMmentioning

confidence: 99%

Effervescence in a glass of champagne: A bubble story

Liger-Belair

Jeandet

2002

Europhysics News

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“…Giant nuclei are thought to play a particularly important role among the aerosol particles, as they might promote the rapid development of precipitation, a topic mentioned and examined already by Woodcock et al (1953) and which is still a topic of active research (e.g., Rudich et al, 2002;Blyth et al, 2003). In general, the role of the aerosol particles in controlling radiative properties of clouds may be important e.g., (Twomey, 1977), but the role of the aerosol in driving precipitation, particularly from shallow clouds, remains controversial (Stevens and Feingold, 2009).…”

Section: Introductionmentioning

confidence: 99%

The fine-scale structure of the trade wind cumuli over Barbados – an introduction to the CARRIBA project

et al. 2013

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Abstract. The CARRIBA (Cloud, Aerosol, Radiation and tuRbulence in the trade wInd regime over BArbados) project, focused on high resolution and collocated measurements of thermodynamic, turbulent, microphysical, and radiative properties of trade wind cumuli over Barbados, is introduced. The project is based on two one-month field campaigns in November 2010 (climatic wet season) and April 2011 (climatic dry season). Observations are based on helicopterborne and ground-based measurements in an area of 100 km 2 off the coast of Barbados. CARRIBA is accompanied by long-term observations at the Barbados Cloud Observatory located at the East coast of Barbados since early in 2010 and which provides a longer-term context for the CARRIBA measurements. The deployed instrumentation and sampling strategy are presented together with a classification of the meteorological conditions. The two campaigns were influenced by different air masses advected from the Caribbean area, the Atlantic Ocean, and the African continent which led to distinct aerosol conditions. Pristine conditions with low aerosol particle number concentrations of ∼100 cm 3 were alternating with periods influenced by Saharan dust or aerosol from biomass burning resulting in comparably high number concentrations of ∼ 500 cm 3 . The biomass burning aerosol was originating from both the Caribbean area and Africa. The shallow cumulus clouds responded to the different aerosol conditions with a wide range of mean droplet sizes and number concentrations. Two days with different aerosol and cloud microphysical properties but almost identical meteorological conditions have been analyzed in detail. The differences in the droplet number concentration and droplet sizes appear not to show any significant change for turbulent cloud mixing, but the relative roles of droplet inertia and sedimentation in initiating coalescence, as well as the cloud reflectivity, do change substantially.

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Giant Condensation Nuclei from Bursting Bubbles

Cited by 154 publications

References 2 publications

Jet dynamics post drop impact on a deep pool

Jet dynamics post drop impact on a deep pool

Effervescence in a glass of champagne: A bubble story

The fine-scale structure of the trade wind cumuli over Barbados – an introduction to the CARRIBA project

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