Thematische Bibliographien / Bubble/foam lifetimes / Zeitschriftenartikel
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Zeitschriftenartikel zum Thema „Bubble/foam lifetimes“

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Veröffentlicht am 25. Mai 2024

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1

Briceño-Ahumada, Zenaida, Alesya Mikhailovskaya, and Jennifer A. Staton. "The role of continuous phase rheology on the stabilization of edible foams: A review." Physics of Fluids 34, no. 3 (2022): 031302. http://dx.doi.org/10.1063/5.0078851.

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Foams play an essential role in food. They contribute to the texture, aroma, and mouthfeel of a product; potentially reduce calories; and visually inspire the consumer. Understanding factors that control foam structure and bubble lifetimes is, therefore, of considerable interest. This review focuses on the effect of the continuous phase rheology for bubbly systems with an emphasis on edible foams. We review common biopolymers used to alter the rheology of the continuous phase of food foams and discuss potential mechanisms responsible for the production and stabilization of such systems. Variat
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2

AbdelKader, Atef. "The effect of cell boundary on 2D foam." MATEC Web of Conferences 192 (2018): 01011. http://dx.doi.org/10.1051/matecconf/201819201011.

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We have studied the effect of cell boundary on 2D foam, with particular attention to perfect arrays of identical bubbles, and those containing only a single defect with time. We have also examined the effect of the wetness of the foam, observing the stability of two-dimensional foam comprising bubble rafts constrained to a fixed area of liquid surface. Perfectly six-fold coordinated foam appear to be unstable against loss of cohesion, but the lifetime to breakage of the perfect foam increases systematically with changing the cell boundaries. Foams containing a single defect are stable against
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3

del Castillo-Santaella, Teresa, Yan Yang, Inmaculada Martínez-González, et al. "Effect of Hyaluronic Acid and Pluronic-F68 on the Surface Properties of Foam as a Delivery System for Polidocanol in Sclerotherapy." Pharmaceutics 12, no. 11 (2020): 1039. http://dx.doi.org/10.3390/pharmaceutics12111039.

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The use of foams to deliver bioactive agents and drugs is increasing in pharmaceutics. One example is the use of foam as a delivery system for polidocanol (POL) in sclerotherapy, with the addition of bioactive compounds to improve the delivery system being a current subject of study. This work shows the influence of two bioactive additives on the structure and stability of POL foam: hyaluronic acid (HA) and Pluronic-F68 (F68). HA is a natural non-surface-active biopolymer present in the extracellular matrix while F68 is a surface-active poloxamer that is biocompatible with plasma-derived fluid
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4

SUN, QICHENG, LIANGHUI TAN, and GUANGQIAN WANG. "LIQUID FOAM DRAINAGE: AN OVERVIEW." International Journal of Modern Physics B 22, no. 15 (2008): 2333–54. http://dx.doi.org/10.1142/s0217979208039514.

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Liquid foams are concentrated dispersions of gas bubbles in a small amount of surfactant solution, which are perpetually out of equilibrium systems. The process of liquid draining through networks of Plateau borders in a fresh foam is so-called foam drainage, as a result of both gravitational and capillary forces, which has great effect on the stability of foams. From the view of foam physics and dynamics, this paper briefly introduces foam structure and major lifetime limiting factors of foam. The substantial progress on the theory of drainage, measuring techniques for liquid fractions, drain
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5

Callaghan, Adrian H., Grant B. Deane, and M. Dale Stokes. "Two Regimes of Laboratory Whitecap Foam Decay: Bubble-Plume Controlled and Surfactant Stabilized." Journal of Physical Oceanography 43, no. 6 (2013): 1114–26. http://dx.doi.org/10.1175/jpo-d-12-0148.1.

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Abstract A laboratory experiment to quantify whitecap foam decay time in the presence or absence of surface active material is presented. The investigation was carried out in the glass seawater channel at the Hydraulics Facility of Scripps Institution of Oceanography. Whitecaps were generated with focused, breaking wave packets in filtered seawater pumped from La Jolla Shores Beach with and without the addition of the surfactant Triton X-100. Concentrations of Triton X-100 (204 μg L−1) were chosen to correspond to ocean conditions of medium productivity. Whitecap foam and subsurface bubble-plu
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6

Arangalage, Mélanie, Jean-Philippe Gingras, Nicolas Passade-Boupat, François Lequeux, and Laurence Talini. "Asphaltenes at Oil/Gas Interfaces: Foamability Even with No Significant Surface Activity." Colloids and Interfaces 3, no. 1 (2018): 2. http://dx.doi.org/10.3390/colloids3010002.

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In the oil industry, oil foams can be found at different steps from the crude oil treatment to the gas stations. Their lifetime can sometimes reach several hours and be much longer than the residence times available for gas/liquid separation. However, the conditions of formation and stability of such foams have been poorly studied in the literature, in contrast to the foamability of aqueous systems. On the fields, it is currently observed that crude oils enriched with asphaltenes form particularly stable foams. In this work, we have studied the influence of asphaltenes on the foamability of oi
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7

San, Jingshan, Sai Wang, Jianjia Yu, Ning Liu, and Robert Lee. "Nanoparticle-Stabilized Carbon Dioxide Foam Used In Enhanced Oil Recovery: Effect of Different Ions and Temperatures." SPE Journal 22, no. 05 (2017): 1416–23. http://dx.doi.org/10.2118/179628-pa.

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Summary This paper reports the study of the effect of different ions (monovalent, bivalent, and multiple ions) on nanosilica-stabilized carbon dioxide (CO2) foam generation. CO2 foam was generated by coinjecting CO2/5,000 ppm nanosilica dispersion (dispersed in different concentrations of brine) into a sandstone core under 1,500 psi and at different temperatures. A sapphire observation cell was used to determine the foam texture and foam stability. Pressure drop across the core was measured to estimate the foam mobility. The results indicated that more CO2 foam was generated as the sodium chlo
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8

Garciadiego Ortega, Eduardo, and Julian RG Evans. "On the energy required to maintain an ocean mirror using the reflectance of foam." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 233, no. 1 (2018): 388–97. http://dx.doi.org/10.1177/1475090217750442.

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Among the various interventions proposed to remediate the health and security effects of climate change by solar radiation protection is the proposal to enhance natural ocean whitecap formation. Compared to other solar protection interventions, this is technically simple and quickly terminated. However, it has a drawback: even if the energy be obtained from wind or wave, the power demand to maintain a foam raft determines the capitalization of equipment. The average power demand is inversely related to foam lifetime which can be prolonged by surfactants preferably derived from ingenerate resou
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9

Gonzalez Viejo, Claudia, Christopher H. Caboche, Edward D. Kerr, et al. "Development of a Rapid Method to Assess Beer Foamability Based on Relative Protein Content Using RoboBEER and Machine Learning Modeling." Beverages 6, no. 2 (2020): 28. http://dx.doi.org/10.3390/beverages6020028.

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Foam-related parameters are associated with beer quality and dependent, among others, on the protein content. This study aimed to develop a machine learning (ML) model to predict the pattern and presence of 54 proteins. Triplicates of 24 beer samples were analyzed through proteomics. Furthermore, samples were analyzed using the RoboBEER to evaluate 15 physical parameters (color, foam, and bubbles), and a portable near-infrared (NIR) device. Proteins were grouped according to their molecular weight (MW), and a matrix was developed to assess only the significant correlations (p < 0.05) with t
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10

Yang, Xin, and Henry Potter. "A Novel Method to Discriminate Active from Residual Whitecaps Using Particle Image Velocimetry." Remote Sensing 13, no. 20 (2021): 4051. http://dx.doi.org/10.3390/rs13204051.

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Whitecap foam generated by wind-driven wave breaking is distinguished as either active (stage A) or residual (stage B). Discrimination of whitecap stages is essential to quantify the influence of whitecaps on the physical and chemical processes at the marine boundary layer. This study provides a novel method to identify whitecap stages based on visible imagery using particle image velocimetry (PIV). Data used are from a Gulf of Mexico cruise where collocated infrared (IR) and visible cameras simultaneously recorded whitecaps. IR images were processed by an established thresholding method to de
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11

Anguelova, Magdalena D., and Paul A. Hwang. "Using Energy Dissipation Rate to Obtain Active Whitecap Fraction." Journal of Physical Oceanography 46, no. 2 (2016): 461–81. http://dx.doi.org/10.1175/jpo-d-15-0069.1.

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AbstractActive and total whitecap fractions quantify the spatial extent of oceanic whitecaps in different lifetime stages. Total whitecap fraction W includes both the dynamic foam patches of the initial breaking and the static foam patches during whitecap decay. Dynamic air–sea processes in the upper ocean are best parameterized in terms of active whitecap fraction WA associated with actively breaking crests. The conventional intensity threshold approach used to extract WA from photographs is subjective, which contributes to the wide spread of WA data. A novel approach of obtaining WA from ene
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12

Guidolin, Chiara, Jonatan Mac Intyre, Emmanuelle Rio, Antti Puisto, and Anniina Salonen. "Viscoelastic coarsening of quasi-2D foam." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-36763-y.

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AbstractFoams are unstable jammed materials. They evolve over timescales comparable to their “time of use", which makes the study of their destabilisation mechanisms crucial for applications. In practice, many foams are made from viscoelastic fluids, which are observed to prolong their lifetimes. Despite their importance, we lack understanding of the coarsening mechanism in such systems. We probe the effect of continuous phase viscoelasticity on foam coarsening with foamed emulsions. We show that bubble size evolution is strongly slowed down and foam structure hugely impacted. The main mechani
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13

Yanagisawa, Naoya, and Rei Kurita. "Cross over to collective rearrangements near the dry-wet transition in two-dimensional foams." Scientific Reports 13, no. 1 (2023). http://dx.doi.org/10.1038/s41598-023-31577-w.

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AbstractLiquid foams respond plastically to external perturbations over some critical magnitude. This rearrangement process is directly related to the mechanical properties of the foams, playing a significant role in determining foam lifetime, deformability, elasticity, and fluidity. In this paper, we experimentally investigate the rearrangement dynamics of foams near a dry-wet transition. When a foam transforms from a dry state to a wet state, it is found that considering collective events, separated T1 events propagate in dry foams, while T1 events occur simultaneously in wet foams. This cro
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14

Ji, Xiaoliang, Wenxuan Zhong, Kangqi Liu, et al. "Extraordinary stability of surfactant‐free bubbles suspended in ultrasound." Droplet, March 20, 2024. http://dx.doi.org/10.1002/dro2.119.

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AbstractGravity‐induced drainage is one of the main destabilizing mechanisms for soap bubbles and foams. Here we show that solely through acoustic levitation without introducing any chemical stabilizers, liquid drainage in the bubble film can be completely inhibited, therefore leading to a significant enhancement of bubble lifetime by more than two orders of magnitude and enabling the bubble to survive puncturing by a needle. Based on sound simulation and force analysis, it has been found that acoustic radiation force, exerted on both the inner and outer surfaces of the levitated bubble, acts
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15

Felistus, Shitakha, Kimathi George, and Songa Caroline. "Modelling Bubble Lifetime of Thin Film Surfactants Solution on Fuel Spillage." Asian Research Journal of Mathematics, June 9, 2021, 20–33. http://dx.doi.org/10.9734/arjom/2021/v17i430291.

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Aims / Objectives: To find the lifetime of the bubble by plotting the rate of mass flow rate change against time. Place and Duration of Study: Department of Mathematics and Applied Science, Catholic University of Eastern Africa, Nairobi, Kenya, between February 2020 and March 2021.
 Methodology: The maximum lifetime of the bubble is assumed to match the time when the mass flow rate change is zero. The study also assumes the velocity of flow rate and other fluid properties at the interface of fuel-surfactant constant other than Re. Re is varied from 0.01 to 100.
 Results: The graphica
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16

Tran, H. P., N. Passade-Boupat, F. Lequeux, and L. Talini. "Mechanisms ruling the lifetimes of films of liquid mixtures." Journal of Fluid Mechanics 944 (July 7, 2022). http://dx.doi.org/10.1017/jfm.2022.528.

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Foams and bubbles formed in liquid mixtures have lifetimes longer by several orders of magnitude than in pure liquids of similar viscosities. We have shown recently that this effect results from slight differences in molecular concentrations between bulk and surfaces, which give rise to a thickness-dependent surface tension of liquid films. We present a quantitative description of the enhanced stability of liquid films in binary mixtures, based on experimental data and theoretical analysis. Experiments were performed with mixtures of different natures and compositions: foams of stationary heig
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17

Lu, Xinqian, Xiang Zhou, Jianxin Luo, Fanhua Zeng, and Xiaolong Peng. "Characterization of Foamy Oil and Gas/Oil Two-Phase Flow in Porous Media for a Heavy Oil/Methane System." Journal of Energy Resources Technology 141, no. 3 (2018). http://dx.doi.org/10.1115/1.4041662.

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In our previous study, a series of experiments had been conducted by applying different pressure depletion rates in a 1 m long sand-pack. In this study, numerical simulation models are built to simulate the lab tests, for both gas/oil production data and pressure distribution along the sand-pack in heavy oil/methane system. Two different simulation models are used: (1) equilibrium black oil model with two sets of gas/oil relative permeability curves; (2) a four-component nonequilibrium kinetic model. Good matching results on production data are obtained by applying black oil model. However, th
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18

Fredericks, Bronwyn, and Abraham Bradfield. "‘More than a Thought Bubble…’." M/C Journal 24, no. 1 (2021). http://dx.doi.org/10.5204/mcj.2738.

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Introduction In 2017, 250 Indigenous delegates from across the country convened at the National Constitution Convention at Uluru to discuss a strategy towards the implementation of constitutional reform and recognition of Aboriginal and Torres Strait Islander peoples (Referendum Council). Informed by community consultations arising out of 12 regional dialogues conducted by the government appointed Referendum Council, the resulting Uluru Statement from the Heart was unlike any constitutional reform previously proposed (Appleby & Synot). Within the Statement, the delegation outlined that to
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