Influence of wetting conditions on bubble formation at orifice in an inviscid liquid

Byakova, A. V.; Gnyloskurenko, Svyatoslav; Nakamura, Takashi; Raychenko, O.I.

doi:10.1016/j.colsurfa.2003.08.009

Cited by 65 publications

(43 citation statements)

References 15 publications

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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

129

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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

129

View full text Add to dashboard Cite

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“…the formation at the orifice rim (hydrophilic surface) and the spreading of the bubble base (hydrophobic surface) [65]. It was also reported that the air bubble volume inside water increased more than half as the equilibrium contact angle increased from 68 o to 110 o [75][76][77].…”

Section: Dynamics Of Bubble Growthmentioning

confidence: 95%

“…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%

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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“…Many investigations of the basic case of bubble formation at a single orifice were reviewed by Kumar and Kuloor, 1 Clift et al, 2 Kulkarni and Joshi, 4 Tsuge, 15 and Sadhal et al 16 Different experimental studies [17][18][19][20][21][22][23][24][25][26][27][28][29] and theoretical approaches [30][31][32][33][34][35][36][37][38] were applied to study the problem of bubble formation at a single orifice or a single nozzle. In most of the theoretical models 17,18,22,32,33,38 developed by these workers, the effect of the previously formed bubble on the growth of the bubble at the orifice were not taken into account, although Zhang and Shoji, 21 Chuang and Goldschmidt, 39 and Deshpande et al 40 developed models by taking into account the wake effect of the previous bubble or bubble coalescence.…”

Section: Introductionmentioning

confidence: 99%

Bubble formation and dynamics in a quiescent high‐density liquid

et al. 2015

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Gas bubble formation from a submerged orifice under constant-flow conditions in a quiescent high-density liquid metal, lead-bismuth eutectic (LBE), at high Reynolds numbers was investigated numerically. The numerical simulation was carried out using a coupled level-set and volume-of-fluid method governed by axisymmetric Navier-Stokes equations. The ratio of liquid density to gas density for the system of interest was about 15,261. The bubble formation regimes varied from quasi-static to inertia-dominated and the different bubbling regimes such as period-1 and period-2 with pairing and coalescence were described. The volume of the detached bubble was evaluated for various Weber numbers, We, at a given Bond number, Bo, with Reynolds number Re ) 1. It was found that at high values of the Weber number, the computed detached bubble volumes approached a 3/5 power law. The different bubbling regimes were identified quantitatively from the time evolution of the growing bubble volume at the orifice. It was shown that the growing volume of two consecutive bubbles in the period-2 bubbling regime was not the same whereas it was the same for the period-1 bubbling regime. The influence of grid resolution on the transition from period-1 to period-2 with pairing and coalescence bubbling regimes was investigated. It was observed that the transition is extremely sensitive to the grid size. The transition of period-1 and period-2 with pairing and coalescence is shown on a Weber-Bond numbers map. The critical value of Weber number signalling the transition from period-1 to period-2 with pairing and coalescence decreases with Bond number as We $ Bo 21 , which is shown to be consistent with the scaling arguments. Furthermore, comparisons of the dynamics of bubble formation and bubble coalescence in LBE and water systems are discussed. It was found that in a high Reynolds number bubble formation regime, a difference exists in the transition from period-1 to period-2 with pairing and coalescence between the bubbles formed in water and the bubbles formed in LBE. V C 2015 American Institute of Chemical Engineers AIChE J, 61: 3996-4012, 2015

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Influence of wetting conditions on bubble formation at orifice in an inviscid liquid

Cited by 65 publications

References 15 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

Bubble formation and dynamics in a quiescent high‐density liquid

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