Modeling Oil Droplets in Plateau Borders

Neethling, S.J.; Morris, G.; Garrett, Peter R.

doi:10.1021/la201406b

Cited by 9 publications

(21 citation statements)

References 19 publications

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“…Yet, contrary to solid particles, the soft oil droplets are in turn deformed by the liquid network of the foam. At equilibrium, the droplets adopt a slender slug shape as recently shown with Surface Evolver simulations [12].…”

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confidence: 65%

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Capillary Flow of Oil in a Single Foam Microchannel

Piroird

Lorenceau

2013

Phys. Rev. Lett.

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When using appropriate surfactants, oil and aqueous foam can be intimately mixed without the foam being destroyed. In this Letter, we show that a foam, initially free of oil, can draw an oil drop under the action of capillary forces and stretch it through the aqueous network. We focus on the suction of oil by a single horizontal foam channel, known as a Plateau border. In such confined channels, imbibition dynamics are governed by a balance between capillarity and viscosity. Yet, the scaling law for our system differs from that of classical imbibition in porous media such as aqueous foam. This is due to the particular geometry of the liquid channels: Plateau borders filled with foaming solution are always concave whereas they can be convex or flat when filled with oil. Finally, the oil slug, confined in the Plateau border, fragments into droplets following a film breakup.

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supporting

confidence: 65%

“…The bar represents 2 mm. The two insets at t = 0.65 and 84.10 s illustrate plausible distributions of oil in the middle-plane (z = 0) cross sections, taken from [12].…”

mentioning

confidence: 99%

Capillary Flow of Oil in a Single Foam Microchannel

Piroird

Lorenceau

2013

Phys. Rev. Lett.

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“…The higher density of the oil droplet results in less buoyancy force (as an oil accumulation driving force) and less stability of foam. [29] Following on from evidence that the oil droplets can enhance the stability of foam, further microscale research into oil droplet effects in PBs was carried out by Neethling et al [100]. They [100] simulated the deformation of oil droplets and PB geometries for different oil sizes and different interfacial tension ratios with Surf ace Evolver software.…”

Section: Methodsmentioning

confidence: 99%

“…[29] Following on from evidence that the oil droplets can enhance the stability of foam, further microscale research into oil droplet effects in PBs was carried out by Neethling et al [100]. They [100] simulated the deformation of oil droplets and PB geometries for different oil sizes and different interfacial tension ratios with Surf ace Evolver software. The meshing and a typical result are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

A review of aqueous foam in microscale

Anazadehsayed

Rezaee

Naser

et al. 2018

Advances in Colloid and Interface Science

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In recent years, significant progress has been achieved in the study of aqueous foams. Having said this, a better understanding of foam physics requires a deeper and profound study of foam elements. This paper reviews the studies in the microscale of aqueous foams. The elements of aqueous foams are interior Plateau borders, exterior Plateau borders, nodes, and films. Furthermore, these elements' contribution to the drainage of foam and hydraulic resistance are studied. The Marangoni phenomena that can happen in aqueous foams are listed as Marangoni recirculation in the transition region, Marangoni-driven flow from Plateau border towards the film in the foam fractionation process, and Marangoni flow caused by exposure of foam containing photosurfactants under UV. Then, the flow analysis of combined elements of foam such as PB-film along with Marangoni flow and PB-node are studied. Next, we contrast the behavior of foams in different conditions. These various conditions can be perturbation in the foam structure caused by injected water droplets or waves or using a non-Newtonian fluid to make the foam. Further review is about the effect of oil droplets and particles on the characteristics of foam such as drainage, stability and interfacial mobility.

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“…On the other hand, oil droplets could enter plateau borders and stretch along the gas-water interface layer or between the adjacent foam films, which would cause the rupture of the foam films. The evolution process of oil droplets in plateau borders has been studied using the classical bridgingstretching model (Arnaudov et al, 2001;Denkov, 2004;Denkov et al, 2014;Karakashev and Grozdanova, 2012;Neethling et al, 2011;Valkovska et al, 2000), in which some parameters were defined to quantitatively evaluate the probability of oil droplets acting as a defoamer.…”

Section: Introductionmentioning

confidence: 99%

Predicting and Controlling the Effect of Solubilized Flavor Oil on Foam Properties of Surfactant through Study of the Adsorption Activity and Configuration

Chen

Zhao

et al. 2019

J Surfact & Detergents

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In the wide application of foam products, the effect of oil additive on foam property is a critical issue that has gained increasing attention; the effect on foam induced by various flavor oils is still a puzzling question, and relative study is rare. In this article, a series of typical flavor oils were studied for their effects on the foam properties of sodium dodecylsulfate. Measurements of foamability, foam stability, foam elasticity, and surface activity were taken; meanwhile, molecular dispersion and interfacial arrangement behavior of surfactant and oil molecules were explored by molecular dynamics simulation. Through a combination of macroscopic phenomenon and microscopic information, how flavor oils with different chemical structures affected the foaming properties of surfactants was demonstrated, and an evaluation scheme for predicting the level of influence on foam properties by different flavor oils was constructed. This investigation may help better understand the role of flavor oils in foam systems and provide a theoretical foundation for optimizing the application of flavor oils in relevant industries.

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Modeling Oil Droplets in Plateau Borders

Cited by 9 publications

References 19 publications

Capillary Flow of Oil in a Single Foam Microchannel

Capillary Flow of Oil in a Single Foam Microchannel

A review of aqueous foam in microscale

Predicting and Controlling the Effect of Solubilized Flavor Oil on Foam Properties of Surfactant through Study of the Adsorption Activity and Configuration

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