The shape of bubbles rising near the nozzle exit in molten metal baths

Iguchi, Manabu; Nakatani, Tadatoshi; Tokunaga, Hirohiko

doi:10.1007/s11663-997-0107-2

Cited by 22 publications

(11 citation statements)

References 20 publications

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“…Previous experiments using electroresistivity probe [18,19] have shown that the shape of a bubble can be correlated as a function of the modified Weber number, We, and the modified Reynolds number, Re, as shown in Fig. 9.9.…”

Section: Single Bubble In Still Liquidmentioning

confidence: 89%

Gas–Liquid Two-Phase Flow

Iguchi

Ilegbusi

2013

Basic Transport Phenomena in Materials Engineering

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Section: Single Bubble In Still Liquidmentioning

confidence: 89%

Gas–Liquid Two-Phase Flow

Iguchi

Ilegbusi

2013

Basic Transport Phenomena in Materials Engineering

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“…These bubbles rose almost straight upward and, hence, brought about the radial distribution of gas holdup with the aforementioned profile. [18] Skirted bubbles appear when the following modified Weber number (We m ) and Reynolds number (Re m ) are relatively low: [18] 2…”

Section: Bubble and Mean Wood's Metal Flow Characteristicsmentioning

confidence: 99%

Turbulence structure of bottom-blowing bubbling jet in a molten Wood’s metal bath

Tokunaga

Iguchi

Tatemichi

1999

Metall Mater Trans B

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The coherent structure of turbulence in a vertical He-Wood's metal bubbling jet formed in a cylindrical vessel was investigated using the four-quadrant classification method. Turbulent motions of molten Wood's metal flow were classified into four distinct categories: ejection (higher-momentum fluid motion, directed outward), sweep (lower-momentum fluid motion, directed inward), outward interaction (lower-momentum fluid motion, directed outward), and inward interaction (higher-momentum fluid motion, directed inward). The relative occurrence in frequency of each turbulent motion and the contributions of each turbulent motion to the axial and radial turbulence kinetic energies and Reynolds shear stress were determined. These quantities were different from their respective values in an air-water vertical bubbling jet. Such differences were found to be closely associated with the fact that the shape and size of bubbles differs significantly between the two bubbling jets. Consequently, the coherent structure of turbulence in a bubbling jet is strongly dependent on the behavior of the wake behind the bubbles.

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“…Therefore, the study of transport phenomena in a gas stirred steelmaking system has received considerable attention over the past few years. [3][4][5][6][7][8][9][10][11][12][13] Szekely et al 3 were the first to model the flows in gas stirred ladles by solution of the turbulent Navier-Stokes equations in conjunction with the k-w turbulent model. Hsiao et al 4 investigated fluid flow phenomena in the water model and industrial argon stirred ladles.…”

Section: Introductionmentioning

confidence: 99%

“…Zhu et al 9 carried out water model experiments and mathematical modelling studies of fluid flow and mixing phenomena in argon stirred ladles with multituyere arrangements. Iguchi et al 10,11 have studied turbulent flow characteristics in a cylindrical bath subject to bottom gas injection. In a recent study, Ganguly et al 12 reported a numerical investigation on the role of bottom gas stirring in controlling thermal stratification in steel ladles.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling studies of flow and mixing phenomena in gas stirred steel ladles

Ganguly¹,

Chakraborty²

2008

Ironmaking & Steelmaking

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A three-dimensional computational fluid dynamics (CFD) model was developed to simulate the fluid flow and mixing phenomena in a gas stirred ladle. Particular attention was paid to incorporate the effect of slippage between rising gas bubbles and surrounding fluid in the numerical model, to capture the relevant flow physics in a more effective manner. Various parametric studies were undertaken to examine the effects of gas flow rate, bottom nozzle configurations and tracer addition locations on mixing time. It was observed that the arrangement of bottom nozzles has a great effect on the mixing behaviour in a gas stirred ladle, with off centric gas injection producing shorter mixing time. Mixing time was found to be sensitive to the tracer addition position, particularly for the axisymmetric bottom gas injection system. The predicted results were compared with reported experimental observations and a very good agreement was observed in this regard, thereby establishing the authenticity of the proposed formulation.

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The shape of bubbles rising near the nozzle exit in molten metal baths

Cited by 22 publications

References 20 publications

Gas–Liquid Two-Phase Flow

Gas–Liquid Two-Phase Flow

Turbulence structure of bottom-blowing bubbling jet in a molten Wood’s metal bath

Numerical modelling studies of flow and mixing phenomena in gas stirred steel ladles

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