Dynamical Transition in a Model for Dry Foams

Hasmy, Anwar; Paredes, R.; Sonneville-Aubrun, O.; Cabane, Bernard; Botet, Robert

doi:10.1103/physrevlett.82.3368

Cited by 35 publications

(23 citation statements)

References 15 publications

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“…In this expression kT is the thermal energy, v 0 is the natural frequency, and E a is the so-called activation energy, i.e., the energy cost for reaching the critical hole radius. Assuming a unique rupturing frequency v per unit film area, numerical simulations performed on a cellular material reveal that the scenario of destruction through coalescence is intrinsically catastrophic and inhomogeneous [1] with a few giant cells growing much more rapidly than the average, in agreement with the experimental observations [2]. Because of the complexity of the destruction scenario in simple emulsions, the measurements of the microscopic parameters v 0 and E a are scarce [3,4].…”

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confidence: 60%

Double Emulsions: A Tool for Probing Thin-Film Metastability

et al. 2001

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We study the kinetics of the release of monodisperse water-in-oil-in-water double emulsions in the regime dominated by coalescence of the internal aqueous droplets onto the globule interface. By measuring the rate of release of adsorbed droplets, we directly determine the average lifetime of the thin film that forms between the small internal droplets and the globule surface. Therefore, the activation energy and the natural frequency of the hole nucleation process within the adhesive thin liquid films are unambiguously deduced.

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confidence: 60%

Double Emulsions: A Tool for Probing Thin-Film Metastability

et al. 2001

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“…Details of a film rupture have been studied in isolated bubbles and droplets [e.g., Debregeas et al , ; Kobayashi et al , ; Oldenziel et al , ; Nguyen et al , ]. In a two‐dimensional foam, it is observed that the generation and coalescence of large voids by film ruptures dominate the gas separation [ Burnett et al , ; Hasmy et al , ]. Similar phenomena have also been reported for immiscible fluids with a large viscosity contrast [ Sato and Sumita , ].…”

Section: Importance Of Film Ruptures On Outgassingmentioning

confidence: 83%

Intermittent and efficient outgassing by the upward propagation of film ruptures in a bubbly magma

Namiki

Kagoshima

2014

J. Geophys. Res. Solid Earth

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We simulated the ascent of bubbly magma in a volcanic conduit by slow decompression experiments using syrup foam as a magma analogue. During decompression, some large voids appear in the foam. The expansion of one void deep in the foam leads to another void expansion, and the void expansion then propagates upward. The void expansion finally reaches the surface of the foam to originate outgassing. The velocity of the upward propagation of void expansions is essentially the same as the rupturing velocity of the bubble film, suggesting that the rupture of films separating each void propagates upward to create the pathway for outgassing. The calculated apparent permeability of decompressed foam can become higher than that measured for natural pumices/scoriae. The upward propagation of film ruptures thus allows for efficient outgassing. This may also appear as the mechanism for energetic gas emissions originating at a depth, such as Strombolian eruptions.

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“…Coalescence in quasi-2D foams was studied by gently heating them [14], the obtained results were afterwards supported by computer simulations [15]. The dynamics of the topological rearrangements was studied in dry quasi-2D foams [16].…”

Section: Introductionmentioning

confidence: 80%

Electrical conductivity of quasi-two-dimensional foams

et al. 2015

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Quasi-2D foams consist of monolayers of bubbles squeezed between two narrowly spaced plates. These simplified foams have served successfully in the past to shed light on numerous issues in foam physics. Here we consider the electrical conductivity of such model foams. We compare experiments to a model which we propose, and which successfully relates the structural and the conductive properties of the foam over the full range of the investigated liquid content. We show in particular that in the case of quasi-2D foams the liquid in the nodes needs to be taken into account even at low liquid content. We think that these results may provide new approaches for the characterisation of foam properties and for the in-situ characterisation of the liquid content of foams in confining geometries, such as microfluidics.

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Dynamical Transition in a Model for Dry Foams

Cited by 35 publications

References 15 publications

Double Emulsions: A Tool for Probing Thin-Film Metastability

Double Emulsions: A Tool for Probing Thin-Film Metastability

Intermittent and efficient outgassing by the upward propagation of film ruptures in a bubbly magma

Electrical conductivity of quasi-two-dimensional foams

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