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Hydrodynamics of foams
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In this article, a brief review article is devoted to all the aspects related to hydrodynamics of foams, focusing on the methods for studying the basic structural units of the foams.Abstract:
This brief review article is devoted to all the aspects related to hydrodynamics of foams. For this reason, we focused at first on the methods for studying the basic structural units of the foams—the foam films (FF) and the Plateau borders (PB), thus reviewing the literature about their drainage. After this, we scrutinized in detail the Derjaguin’s works on the electrostatic disjoining pressure along with its Langmuir’s interpretation, the microscopic and macroscopic approaches in the theory of the van der Waals disjoining pressure, the DLVO theory, the steric disjoining pressure of de Gennes, and the more recent works on non-DLVO forces. The basic methods for studying of foam drainage are presented as well. Engineering and other applications of foam are reviewed as well. All these aspects are presented from retrospective and perspective viewpoints.read more
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Review of foam fractionation as a water treatment technology
TL;DR: Foam fractionation is a well-developed technology used to separate surface-active compounds from solution by exploiting their affinity for the air-water interface as discussed by the authors, which has since evolved into a key technology for treatment of many different pollutants from a variety of different industries such as textiles and dyes, heavy metals, proteins in food processing waste and even per-and polyfluoroalkyl substances (PFAS).
Journal ArticleDOI
Experimental study of aqueous foam generation and transport in a horizontal pipe for deliquification purposes
Luigi Pietro Maria Colombo,Igor Matteo Carraretto,Alberto Di Lullo,Claudio Passucci,Alessandro Allegrucci +4 more
TL;DR: In this paper, the results of experimental activities aimed at a preliminary characterization of foamy flows for pipeline dewatering, in order to assess whether the addition of surfactants may effectively reduce the liquid holdup in horizontal pipelines.
Journal ArticleDOI
Foam-in-vein: A review of rheological properties and characterization methods for optimization of sclerosing foams.
Alireza Meghdadi,Stephen A. Jones,Venisha A. Patel,Andrew L. Lewis,Timothy M. Millar,Dario Carugo +5 more
TL;DR: The physics of foams and the attempts at optimizing them for sclerotherapy are focused on, which takes the form of a discussion of the most recent numerical and experimental models, as well as an overview of clinically relevant parameters.
Journal ArticleDOI
From Individual Liquid Films to Macroscopic Foam Dynamics: A Comparison between Polymers and a Nonionic Surfactant
TL;DR: In this paper , the authors compare the macroscopic drainage and ultimate collapse of aqueous foams stabilized by either a partially hydrolyzed poly(vinyl alcohol) (PVA) or a nonionic low-molecular-weight surfactant (BrijO10) with the dynamics of individual thin films at the microscale.
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Drainage via stratification and nanoscopic thickness transitions of aqueous sodium naphthenate foam films
Chrystian Ochoa,Chenxian Xu,Carina D. V. Martínez Narváez,William Yang,Yiran Zhang,Vivek Sharma +5 more
TL;DR: In this paper, the authors compared the drainage of aqueous foam films formulated with NaN with foams containing sodium dodecyl sulfate (SDS), a well-studied surfactant system, in the relatively low concentration regime (c/CMC < 12.5).
References
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TL;DR: The forces between atoms and molecules are discussed in detail in this article, including the van der Waals forces between surfaces, and the forces between particles and surfaces, as well as their interactions with other forces.
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The London—van der Waals attraction between spherical particles
TL;DR: In this article, the London-v.d. interaction between two spherical particles is computed as a function of the diameters and the distance separating them, and a table is calculated which enables numerical application of the formulae derived.
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Theory of the Stability of Lyophobic Colloids
TL;DR: Theory of the Stability of Lyophobic Colloids The Interaction of Sol Particles having an Electric Double Layer and the nature of the electrical double layer which exists around them in salt solutions is discovered.