Bubble growth by injection of gas into viscous liquids in cylindrical and conical tubes

López-Villa, A.; Medina, A.; Higuera, F. J.

doi:10.1063/1.3643248

Cited by 11 publications

(5 citation statements)

References 31 publications

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“…The departure bubble volume was affected by the angle of the cone or the radius of the cylinder. The results confirmed that the departure volume of the vertically elongated bubbles were significantly larger than those of the round bubbles, generated in the absence of walls, where the radius of cylindrical was smaller than six times of the radius of the orifice, or when the angle of the cone was smaller than 30 o [87]. As bubble grew inside a cylinder or a cone filled with liquid, the surrounded liquid moves downward and eventually, the liquid filled the gap after the bubble departure.…”

Section: Dynamics Of Bubble Growthsupporting

confidence: 75%

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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Section: Dynamics Of Bubble Growthsupporting

confidence: 75%

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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“…As was mentioned above, here we shall use a single capillary tube for foam generation in thin and long pipes in order to control the uniformity of bubble sizes. It has been demonstrated that if the ratio of the diameter of the pipe (containing the liquid) over the diameter of the capillary tube (through which the gas is injected) is large, then the effects of the wall on the shape and size of the emerging bubbles is almost negligible [17]. In this context, an important parameter to characterize the foam formation is the so-called Bikerman's unit of foaminess, which is defined by the relation…”

Section: Measurable Foam Propertiesmentioning

confidence: 99%

Experimental study on the rise of aqueous foams in vertical pipes

Salazar

Sigalotti

Ovando

et al. 2022

Preprint

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In this paper we report experiments on the growth of dry foams and their rise in thin vertical pipes of different circular cross-sectional radii. Air injection at the bottom of the pipes is performed at a constant flow rate by means of a single capillary tube. The formation and rising of the foam was investigated for two different cases: (a) when the top cap of the vertical pipes is open and (b) when it is closed. We find that the position and velocity of the foam front as well as the foam dispersivity are both dependent on the pipe diameter and on whether its top end is open or capped. When the top is open, the foam column grows faster compared to the case when it is sealed. In pipes of small diameters, the growth rate is nonlinear and faster than in pipes of large diameters in which cases the foam rises at an almost constant rate. As the diameter of the pipe increases, the size of the produced bubbles also increases. In closed-top pipes the foams tend to be more homogeneous than in open top pipes. The experimental observations indicate that under foam drainage driven by gravity, the liquid flow velocity across the Plateau borders is indicative of a drainage model based on a plug-like flow in channels with fully mobile interfaces, where viscous dissipation occurs only in the nodes.

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“…As was mentioned above, here we shall use a single capillary tube for foam generation in vertical pipes with length over diameter ratios in the interval 25 ≤ h/D ≤ 80, as shown in the last column of Table 1, in order to control the uniformity of bubble sizes. It has been demonstrated that if the ratio of the diameter of the pipe (containing the liquid) over the diameter of the capillary tube (through which the gas is injected) is large, then the effects of the wall on the shape and size of the emerging bubbles is almost negligible [18]. In this context, an important parameter to characterize the foam formation is the so-called Bikerman's unit of foaminess, which is defined by the relation…”

Section: Measurable Foam Propertiesmentioning

confidence: 99%

Experimental study on the rise of aqueous foams in vertical pipes

et al. 2022

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In this paper we report experiments on the growth of dry foams and their rise in vertical pipes of different circular cross-sectional radii with length over diameter ratios in the interval 25 ≤ h/D ≤ 80 for applications in the study of fracture stimulation in enhanced oil recovery processes. Air injection at the bottom of the pipes is performed at a constant flow rate by means of a single capillary tube. The formation and rising of the foam was investigated for two different cases: 1) when the top cap of the vertical pipes is open and 2) when it is closed. We find that the position and velocity of the foam front as well as the foam dispersivity are both dependent on the pipe diameter and on whether its top end is open or capped. When the top is open, the foam column grows faster compared to the case when it is sealed. In pipes with h/D ≥ 30, the growth rate is non-linear and faster than in pipes with h/D < 30 in which cases the foam rises at an almost constant rate. As the diameter of the pipe increases, the size of the produced bubbles also increases. In closed-top pipes the foams tend to be more homogeneous than in open top pipes. The experimental observations indicate that under foam drainage driven by gravity, the liquid flow velocity across the Plateau borders is indicative of a drainage model based on a plug-like flow in channels with fully mobile interfaces, where viscous dissipation occurs only in the nodes.

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Bubble growth by injection of gas into viscous liquids in cylindrical and conical tubes

Cited by 11 publications

References 31 publications

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

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

Experimental study on the rise of aqueous foams in vertical pipes

Experimental study on the rise of aqueous foams in vertical pipes

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