Fluid instabilities in the birth and death of antibubbles

Dorbolo, Stéphane; Caps, Hervé; Vandewalle, Nicolas

doi:10.1088/1367-2630/5/1/161

Cited by 55 publications

(45 citation statements)

References 7 publications

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“…On the other hand, the works concerning the antibubbles are no older than 5 years [3][4][5][6][7][8]. Most of these studies are concentrated on the mechanism that allows the antibubble to be generated [3,7,8].…”

Section: Introductionmentioning

confidence: 99%

Antibubble lifetime: Influence of the bulk viscosity and of the surface modulus of the mixture

Dorbolo

Terwagne

Delhalle

et al. 2010

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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a b s t r a c tLifetime of antibubbles has been measured for different liquid mixtures. The life duration of an antibubble is governed by the air drainage from the bottom to the top of the antibubble. We show that their lifetime is influenced by both bulk and surface properties of the liquid mixture used to create the antibubble. When the viscosity is increased, the stability of the antibubbles during the first seconds of their life is enhanced. By changing the surface modulus by a factor 100, the mean antibubble lifetime is doubled. Surfactants can affect the mobility of the film surface and, thereby, the rate of air film thinning.

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Section: Introductionmentioning

confidence: 99%

Antibubble lifetime: Influence of the bulk viscosity and of the surface modulus of the mixture

Dorbolo

Terwagne

Delhalle

et al. 2010

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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show abstract

“…They were coined "antibubbles" in the 1970s [11]. Only a few works [1][2][3][12][13][14] have been devoted to a quantitative study of antibubbles. They are mainly focussed on either the formation of antibubbles or the stability of such objects.…”

Section: Antibubblesmentioning

confidence: 99%

“…The amount of air trapped in an antibubble is quite small. If a uniform air film is considered, the thickness ε should be around 3-5 m [1]. The dark and thick border is due to total reflection of light.…”

Section: Antibubblesmentioning

confidence: 99%

“…The main subject of this paper is to collect our major results obtained from a series of experimental works on droplet-based fluidic objects [1][2][3][4][5][6][7][8][9]. The paper gives an overview of what was done in the past 5 years in the Group for Research and Applications in Statistical Physics (GRASP) at the University of Liège, Belgium.…”

Section: Introductionmentioning

confidence: 99%

“…The present story starts in 2003 with a systematic study [1] of antibubbles which raised a lot of questions. Some of them are still open nowadays.…”

Section: Introductionmentioning

confidence: 99%

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Antibubbles, liquid onions and bouncing droplets

Vandewalle

Terwagne

Gilet

et al. 2009

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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a b s t r a c tIn this paper, we emphasize our long series of experiments proving that the physical processes along fluid interfaces can be exploited for creating unusual fluidic objects. We report for the first time a couple of new fluidic objects so-called "liquid onions" and "mayonnaise" droplets. The study starts from the observation of antibubbles, exhibiting unstable liquid-air-liquid interfaces. We show that the lifetime of such a system has the same origin as floating/coalescing droplets on liquid surfaces. By analyzing such behaviours, we created droplets bouncing on a liquid bath. The methods and physical phenomena collected in this paper provide a basis for the development of a discrete microfluidics. Open questions are underlined, experimental challenges and future applications are proposed.

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Experimental acoustic characterization of an endoskeletal antibubble contrast agent: First results

et al. 2021

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An antibubble is an encapsulated gas bubble with an incompressible inclusion inside the gas phase. Current-generation ultrasound contrast agents are bubble-based: they contain encapsulated gas bubbles with no inclusions. The objective of this work is to determine the linear and nonlinear responses of an antibubble contrast agent in comparison to two bubble-based ultrasound contrast agents, that is, reference bubbles and SonoVue TM . Methods: Side scatter and attenuation of the three contrast agents were measured, using single-element ultrasound transducers, operating at 1, 2.25, and 3.5 MHz. The scatter measurements were performed at acoustic pressures of 200 and 300 kPa for 1 MHz, 300 kPa, and 450 kPa for 2.25 MHz, and 370 and 560 kPa for 3.5 MHz. Attenuation measurements were conducted at pressures of 13, 55, and 50 kPa for 1, 2.25, and 3.5 MHz, respectively. In addition, a dynamic contrast-enhanced ultrasound measurement was performed, imaging the contrast agent flow through a vascular phantom with a commercial diagnostic linear array probe. Results: Antibubbles generated equivalent or stronger harmonic signal, compared to bubble-based ultrasound contrast agents. The second harmonic sidescatter amplitude of the antibubble agent was up to 3 dB greater than that of reference bubble agent and up to 4 dB greater than that of SonoVue TM at the estimated concentration of 8 × 10 4 bubbles/mL. For ultrasound with a center transmit frequency of 1 MHz, the attenuation coefficient of the antibubble agent was 8.7 dB/cm, whereas the attenuation coefficient of the reference agent was 7.7 and 0.3 dB/cm for SonoVue TM . At 2.25 MHz, the attenuation coefficients were 9.7, 3.0, and 0.6 dB/cm, respectively. For 3.5 MHz, they were 4.4, 1.8, and 1.0 dB/cm, respectively. A dynamic contrast-enhanced ultrasound recording showed the nonlinear signal of the antibubble agent to be 31% greater than for reference bubbles and 23% lower than SonoVue TM at a high concentration of 2 × 10 6 bubbles/mL. Conclusion: Endoskeletal antibubbles generate comparable or greater higher harmonics than reference bubbles and SonoVue TM . As a result, antibubbles with liquid therapeutic agents inside the gas phase have high potential to become a traceable therapeutic agent. K E Y W O R D S harmonic imaging, linear attenuation, nonlinear scattering, pickering-stabilised bubbles, ultrasound contrast agentThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Fluid instabilities in the birth and death of antibubbles

Cited by 55 publications

References 7 publications

Antibubble lifetime: Influence of the bulk viscosity and of the surface modulus of the mixture

Antibubble lifetime: Influence of the bulk viscosity and of the surface modulus of the mixture

Antibubbles, liquid onions and bouncing droplets

Experimental acoustic characterization of an endoskeletal antibubble contrast agent: First results

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