Role of Interfacial Tension in the Formation and the Detachment of Air Bubbles. 1. A Single Hole on a Horizontal Plane Immersed in Water

Lin, Jie; Banerji, Samir K.; Yasuda, H. K.

doi:10.1021/la00015a054

Cited by 56 publications

(73 citation statements)

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“…In this way the bubble dynamics can be scrutinised and the influence of well controlled parameters understood unambiguously. This being the case, there has been a great deal of experimental work done with regard to adiabatic gas injected bubble growth dynamics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Some work has been performed on mathematically predicting adiabatic bubble formation and include the use of the boundary integral method [17][18][19][20][21], the Lattice-Boltzmann method [22] and numerical integration of the capillary equation [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of gas injected bubble growth from submerged orifices

Bari

Robinson

2013

Experimental Thermal and Fluid Science

123

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a b s t r a c tThis work investigates the mechanism of adiabatic gas bubble growth from submerged orifices with the view of elucidating the interdependence of the bubble shape and the pressure field during growth and departure. Air injection flow rates between 10 mlph and 100 mlph have been tested for orifices of diameters 0.58 mm, 1.05 mm and 1.6 mm. The force field around single isolated bubbles during growth and detachment has been investigated experimentally with the aid of high speed photography and detailed image processing and measurement of the internal bubble pressure. Different flow rates have been compared in order to elucidate dynamic effects. Combining measurements of the instantaneous gas pressure, measurements of the local curvature and the Young-Laplace equation has allowed the estimation of the liquid pressure field acting on the gas-liquid interface over the entire bubble surface. These have subsequently been decomposed into constitutive components such as buoyancy, contact pressure, capillary and the dynamic pressure forces.

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Section: Introductionmentioning

confidence: 99%

Experimental study of gas injected bubble growth from submerged orifices

Bari

Robinson

2013

Experimental Thermal and Fluid Science

123

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“…It has been reported that at relatively low gas flow rates, the bubble volume increased with the increase of the surface tension, radius of orifice and was independent of gas flow rate. Though the bubble volume remained fairly independent of the flow rate, the bubble frequency increased as the gas flow rate increased gradually [74]. For high gas flow rates, however, the bubble volume became proportional to the gas flow rate and independent of surface tension [72].…”

Section: Dynamics Of Bubble Growthmentioning

confidence: 94%

“…Certain nanoparticles have been found to modify significantly the triple line and bubble dynamics, which cannot be described by the classical Young equation, as reviewed below. [74,[88][89][90], materials and wettability [74,88,[75][76][77], and detailed dynamics of triple line and bubble growth [13][14], as briefly reviewed below.…”

Section: Effect Of Nanoparticles On the Behavior Of Triple Linementioning

confidence: 99%

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Modification of the Young–Laplace equation and prediction of bubble interface in the presence of nanoparticles

Vafaei

Wen

2015

Advances in Colloid and Interface Science

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Abstract:Bubbles are fundamental to our daily life and have wide applications such as in the chemical and petrochemical industry, pharmaceutical engineering, mineral processing and colloids engineering. This paper reviews the existing theoretical and experimental bubble studies, with a special focus on the dynamics of triple line and the influence of nanoparticles on the bubble growth and departure process. Nanoparticles are found to influence significantly the effective interfacial properties and the dynamics of triple line, whose effects are dependent on the particle morphology and their interaction with the substrate. While the Young-Laplace equation is widely applied to predict the bubble shape, its application is limited under highly non-equilibrium conditions. Using gold nanoparticle as an example, new experimental study is conducted to reveal the particle concentration influence on the behaviour of triple line and bubble dynamics. A new method is developed to predict the bubble shape when the interfacial equilibrium conditions cannot be met, such as during the oscillation period. The method is used to calculate the pressure difference between the gas and liquid phase, which is shown to oscillate across the liquid-gas interface and is responsible for the interface fluctuation. The comparison of the theoretical study with the experimental data shows a very good agreement, which suggests its potential application to predict bubble shape during non-equilibrium conditions.

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“…Numerous experimental and modeling studies have been conducted over the past decades on bubble formation from a single orifice or nozzle submerged in liquids, mostly under ambient conditions (Kupferberg and Jameson, 1969;Kumar and Kuloor, 1970;Azbel, 1981;Lin et al, 1994;. Among various factors that affect the bubble formation, the wettability of the orifice surface is an important factor, which affects the initial size of the bubble formed on the orifice.…”

Section: Bubble Formation Initial Bubble Size and Jettingmentioning

confidence: 99%

Advanced Diagnostic Techniques for Three-Phase Slurry Bubble Column Reactors(sbcr)

Al‐Dahhan¹,

Fan²,

Duduković³

2003

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The objectives set for this cooperative project between Washington University (WU), Ohio State University (OSU), and Air Products and Chemicals, Inc. (APCI) to advance the understanding of the Fischer-Tropsch (FT) slurry bubble column reactor hydrodynamics for proper design and scale-up via advanced diagnostic techniques have been accomplished successfully despite the unexpected challenging technical difficulties in implementing the advanced techniques in high pressure stainless steel slurry bubble column.In this work, a detailed review of the aspects of high pressure phenomena of bubbles in liquids and liquid-solids suspension was performed. All the challenging technical problems mentioned above were resolved and the advanced measurement techniques were successfully used in this project. The effects of reactor pressure, superficial gas velocity, solids loading, and liquid physical properties on the overall gas holdup, holdups distribution, recirculation velocity, turbulent parameters, bubble dynamics (size and rise velocity) were investigated via advanced measurement techniques that includes optical probe, Laser Doppler Anemometry (LDA), Computed Tomography (CT), Computer Automated Radioactive Particle Tracking (CARPT). The findings are discussed and analyzed in this report. In attempt to advance the design and scale-up of bubble columns, new correlations have been developed based on a large bank of data collected at a wide range of operating and design conditions. These correlations are for prediction of radial gas holdup profile, axial liquid velocity profile, overall gas holdup based on Neural Network and gas-liquid mass transfer coefficient.Despite the noticeable advances made on FT SBCR as a part of this project, there are still many parameters and challenging issues that need to be further and properly investigated and understood before this technology will be readily used for alternative fuel development technology. iv ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR)Final Technical Report DE-FG-26-99FT40594 Bubble column reactor of 6" without ports used for CARPT/CT measurements. CT1, CT2, CT3 represents the scan levels used in this investigation 30 Figure 3. 4 Bubble column reactor of 6" with ports used for overall gas holdup and DP measurements. CT1, CT2, CT3 represents the scan levels used in this investigation. 31 Effect of superficial gas velocity on gas holdup profile (airwater-glass beads 150 (µm) in 6" column with 9.1 % vol. solids loading at 0.1 MPa 50 Figure 4.10 Effect of superficial gas velocity on solids axial velocity profile (air-water-glass beads 150 µm) in 6" column with 9.1 % vol. solids loading at 0.1 MPa 50 Figure 4.11 Effect of superficial gas velocity on solids shear stress profile (air-water-glass beads 150 µm) in 6" column with 9.1 % vol. solids loading at 0.1 MPa 50 Figure 4.12 Effect of superficial gas velocity on TKE (air-water-glass beads 150 µm) in 6" column with 9.1 % vol. solids loading at 0.1 MPa 51 Figure 4.13 Effect of superf...

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Role of Interfacial Tension in the Formation and the Detachment of Air Bubbles. 1. A Single Hole on a Horizontal Plane Immersed in Water

Cited by 56 publications

References 0 publications

Experimental study of gas injected bubble growth from submerged orifices

Experimental study of gas injected bubble growth from submerged orifices

Modification of the Young–Laplace equation and prediction of bubble interface in the presence of nanoparticles

Advanced Diagnostic Techniques for Three-Phase Slurry Bubble Column Reactors(sbcr)

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