Journal ArticleDOI
A Generalized View of Foam Drainage: Experiment and Theory
TLDR
In this paper, a new experimental method is presented using fluorescein dye to determine the spatial and temporal variations of the liquid volume fraction in aqueous foams This method was used for quantitative studies of liquid redistribution (drainage) in three types of experiments: forced, free, and pulsed drainage Characteristic quantities, such as the drainage velocity, show power-law dependences on experimental parameters that are inconsistent with traditional foam drainage models based on Poiseuille-type flow in the liquid-carrying channels (Plateau borders) of the foam.Abstract:
A new experimental method is presented using fluorescein dye to determine the spatial and temporal variations of the liquid volume fraction in aqueous foams This method is used for quantitative studies of liquid redistribution (drainage) in three types of experiments: forced, free, and pulsed drainage Characteristic quantities, such as the drainage velocity, show power-law dependences on experimental parameters that are inconsistent with traditional foam drainage models based on Poiseuille-type flow in the liquid-carrying channels (Plateau borders) of the foam To obtain a theoretical description, the foam drainage equation is generalized using an energy argument which accounts for viscous dissipation in both the channels and the nodes (or vertices, which are the junctions of four channels) of the liquid network Good agreement with results for all three types of drainage experiments is found when using this new model in the limit where the dissipation is dominated by the nodesread more
Citations
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Colloids and Surfaces A: Physicochemical and Engineering Aspects
TL;DR: In this article, a long series of experiments proving that the physical processes along fluid interfaces can be exploited for creating unusual fluidic objects was presented, such as liquid onions and mayonnaise droplets.
Journal ArticleDOI
Food protein functionality: A comprehensive approach
TL;DR: This review will focus on integrating the colloidal/polymer and biological aspects of protein functionality using foams and gels to illustrate colloidal-polymer aspects and bioactive peptides and allergenicity to demonstrate biological function.
Journal ArticleDOI
Physical chemistry in foam drainage and coarsening
TL;DR: This review covers recent advances in the study of foam drainage and coarsening, focusing especially on the effective role of the foam chemical components on those aging processes, and summarizes how the surfactant, the liquid bulk properties, and the gas modify or not the drainage andCoarsening features.
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Rheology of liquid foam
TL;DR: A review of experiments, numerical simulations and theoretical models concerning foam rheology can be found in this paper, where the authors briefly recall the basic physics and physicochemistry of foams.
Journal ArticleDOI
Foam stability in the presence of oil: Effect of surfactant concentration and oil type
TL;DR: In this paper, a study of foamability and foam stability in the absence and in the presence of alkane-type oils for various surfactants was conducted, and the results for foam stability were discussed in terms of the classical entering/spreading coefficient, oil solubilization effect and stability of pseudoemulsion film.
References
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Foam Drainage: Experiinents and a New Model
TL;DR: In this article, a new experimental method for determining the spatial and ten-time variations of the liquid volume fraction distribution in aqueons foams is presented. But this method is limited to soap foam.