Influence of wetting conditions on bubble formation at orifice in an inviscid liquid. Transformation of bubble shape and size

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

doi:10.1016/s0927-7757(02)00592-7

Cited by 89 publications

(62 citation statements)

References 16 publications

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“…5 Dependence of bubble volume, V b on contact angle, in WaterAir 10,11,24) and Liquid Aluminum -Argon systems. Q -gas flow rate, inner diameter of the injection hole, D i ¼ 1 mm.…”

Section: Resultsmentioning

confidence: 99%

“…contact angle, between solid surface, on which bubble is formed and surrounding fluid medium, to the bubble volume and formation mechanism was well studied for aqueous systems [8][9][10][11] a direct extrapolation of the results to liquid metals is often misleading. A few studies in liquid metal showed that wettability of nozzles plays an important role in bubble growth.…”

Section: Introductionmentioning

confidence: 99%

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Wettability Effect on Bubble Formation at Nozzles in Liquid Aluminum

Gnyloskurenko

Nakamura

2003

Mater. Trans.

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An experimental study was undertaken to determine how wettability affect the volume and formation of gas bubble at nozzles in liquid aluminum. X-ray fluoroscope was used to carry out in-situ observation in the melt. The nozzles were made of steel, silica and alumina to establish different wettability by liquid aluminum. The frequency of bubble formation and the bubbles volume were investigated for low gas flow rate from 0.43 to 12 cm 3 /s and for various diameters of the nozzle. It was shown that bubble volume increased with wettability worsening both for aqueous and metallic systems. A further insight into the mechanism of the bubble formation was obtained by comparison of the bubble behavior at the tip of the injection devices in liquid aluminum and water.

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“…5 Dependence of bubble volume, V b on contact angle, in WaterAir 10,11,24) and Liquid Aluminum -Argon systems. Q -gas flow rate, inner diameter of the injection hole, D i ¼ 1 mm.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wettability Effect on Bubble Formation at Nozzles in Liquid Aluminum

Gnyloskurenko

Nakamura

2003

Mater. Trans.

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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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“…Present res sult ×100% ... (17) It is noteworthy that the experiments of Gerlach et al 26) and Gnyloskurenko et al 25) were both operated under quasi-static conditions, in which the liquid flow velocity was approximately equal to zero. As such, liquid flow had no effect on bubble formation.…”

Section: % Difference = Present Results -Results From Other Researchmentioning

confidence: 99%

“…Gnyloskurenko et al 25) performed water modeling to investigate the surface phenomena effect on bubbles generated from a submerged nozzle with an inner diameter of 1 mm. The gas flow rate was fixed as 0.002 L/min.…”

Section: Regimes Of Bubble Formationmentioning

confidence: 99%