Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water

Corchero, G.; Medina, A.; Higuera, F. J.

doi:10.1016/j.colsurfa.2006.04.046

Cited by 34 publications

(40 citation statements)

References 17 publications

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“…We found in a previous work 7 that a length of 40 cm suffices to make the pressure drop in the air line large compared to the pressure variations in the bubble during the growth process and, therefore, ensure a constant flow rate in our experiments, which is one of the premises of the numerical work. To check that the flow rate is constant, the evolution of the attached bubble was video recorded; the contour of the bubble was extracted from the video images using a standard algorithm 33 implemented in a home made code; and the volume of the bubble, V(t) and the height of its center of mass, x CM (t) were computed assuming that the bubble is axisymmetric.…”

Section: -5mentioning

confidence: 93%

“…[1][2][3][4][5][6][7][8] Results of these studies are of interest in metallurgical and chemical industries, for example, where liquids of low viscosity, such as liquid metals and aqueous solutions, need to be handled. Bubbles in these liquids can be used to modify the concentrations of different substances and promote chemical reactions between them, to clean liquids from impurities captured by adhesion or diffusion processes, and for many other purposes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

López-Villa¹,

Medina²,

Higuera³

2011

Physics of Fluids

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The effect of partial confinement on the shape and volume of bubbles generated by injection of a constant flow rate of gas into a very viscous liquid is studied numerically and experimentally. Numerical solutions of the Stokes equations for the liquid and the evolution equation for the surface of a bubble, and experiments with two different liquids, show that cylindrical and conical walls concentric with a gas injection orifice in the horizontal bottom of the liquid may strongly affect the shape and volume of the bubbles, and can be used to control the size of the generated bubbles without changing the flow rate of gas. A well-known scaling law for the volume of the bubbles generated by injection of a high flow rate of gas in a very viscous unconfined liquid is extended to take into account the presence of cylindrical or conical walls around the injection orifice.

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Section: -5mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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

López-Villa¹,

Medina²,

Higuera³

2011

Physics of Fluids

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“…When plotted as a function of bubble volume, the radius of contact line exhibits a weak dependence on the flow rate; only slight difference is observed at the last stage of bubble formation. For large sized nozzles, Corchero et al [21] reported a weak dependence of the maximum radius of the contact line on flow rates for equilibrium contact angles of over 90°. From Fig.…”

Section: Bubble Characteristicsmentioning

confidence: 98%

Bubble formation on a submerged micronozzle

Vafaei

Wen

2010

Journal of Colloid and Interface Science

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“…This influences the bubble base diameter along the surface material and the final detached bubble volume. Gnyloskurenko et al, 28 Byakova et al, 29 Lin et al, 78 and Corchero et al 79 experimentally and Gerlach et al 55 numerically found that the size of the detached bubble is controlled by the orifice diameter when 0 0 u s < 68 0 (referred to as good wettability) and is independent of the contact angle. It was found that when u s < 68 0 the bubble base coincides with the edge of the orifice during the bubble formation process.…”

Section: Grid Independence Test and Validationmentioning

confidence: 95%

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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Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water

Cited by 34 publications

References 17 publications

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

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

Bubble formation on a submerged micronozzle

Bubble formation and dynamics in a quiescent high‐density liquid

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