Journal ArticleDOI
Breakup of surfactant-laden jets above the critical micelle concentration
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In this paper, a model for the interaction between these phases and the surface tension obeys a nonlinear equation of state is developed for the breakup of viscous liquid jets that contain surfactant, that is potentially above the critical micelle concentration.Abstract:
The breakup of viscous liquid jets that contain surfactant, that is potentially above the critical micelle concentration (CMC) is considered here within the long-wave approximation. The soluble surfactant is assumed to be present in three phases: as an interfacial species, bulk monomers and micelles. A model is developed for the interaction between these phases and the surface tension which obeys a nonlinear equation of state. The effects of the equation of state and the reservoir of surfactant created by micelles on breakup are investigated. The long-wave approximation naturally leads to a system of coupled one-dimensional equations that are solved numerically. It is demonstrated that jet breakup and satellite formation are critically affected by the presence of high surfactant concentrations above the CMC. This manifests itself by the formation of unusually large satellites. We present extensive numerical evidence that the mechanism for this phenomenon centres on the interplay between Marangoni stresses and the nonlinear surfactant equation of state; the latter exhibits a plateau at high interfacial concentrations.read more
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Dripping, jetting and tip streaming
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The Dynamic Surface Tension of Water.
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Dripping, jetting and tip streaming
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Coal dust suppression based on water mediums: A review of technologies and influencing factors
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Dynamic interfacial tension effects in the rupture of liquid necks
M. Robert de Saint Vincent,Julien Petit,Mounir Aytouna,Jean-Pierre Delville,Daniel Bonn,Hamid Kellay +5 more
TL;DR: In this paper, the authors examine the rupture of fluid necks during droplet formation of surfactant-laden liquids and observe deviations from expected behaviour for the pinch-off of such necks.
References
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Book
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TL;DR: The structure of concentrated dispersions thin films Emulsions Microemulsions Rheology of colloidal dispersions and their properties are described in detail in this paper, with a focus on statistical mechanics of fluids.
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TL;DR: In this paper, a flow-focusing geometry is integrated into a microfluidic device and used to study drop formation in liquid-liquid systems, where both monodisperse and polydisperse emulsions can be produced.
Journal ArticleDOI
Nonlinear dynamics and breakup of free-surface flows
TL;DR: In this article, the authors review the theoretical development of this field alongside recent experimental work, and outline unsolved problems, as well as a host of technological applications, ranging from printing to mixing and fiber spinning.