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Liquid-liquid mass transfer characterization applied to metallurgical process

Abstract : In order to characterize the mass transfer between the liquid steel and another liquid phase in the case of a stirred tank with injection of argon used in steelmaking processes, a scale experiment using water at room temperature is chose. In addition, a direct numerical simulation of the experiment is carried out with dynamic adaptive mesh. The experimental and numerical results show that the "open eye" area increases with the air flow rate as well as a mechanism of fragmentation of the oil layer taking place at similar flow rates. Subsequently, the measurements of the mass transfer of thymol between water and oil show that the mass transfer increases abruptly when the air flow rate exceeds a critical value for which a significant formation of oil droplets is observed. Numerical results show a variation of the concentration of tracer mainly along the water-oil interface as expected in the experiment. However, from the limited amount of numerical simulations one does not observe the abrupt increase in mass transfer seen with the experimental results. Finally, mass transfer correlations were established from analysis based on boundary layer theory. These correlations give a relatively good prediction of the first mass transfer regime for the experimental results.
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Submitted on : Wednesday, November 17, 2021 - 6:34:14 PM
Last modification on : Friday, December 3, 2021 - 11:42:56 AM

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JOUBERT_Nelson_these_2021.pdf
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  • HAL Id : tel-03227840, version 2

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Nelson Joubert. Liquid-liquid mass transfer characterization applied to metallurgical process. Fluid mechanics [physics.class-ph]. Sorbonne Université, 2021. English. ⟨NNT : 2021SORUS055⟩. ⟨tel-03227840v2⟩

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