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Measurement and modeling of turbulence in the gas/liquid two-phase zone during gas injection

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Abstract

Averaged and turbulent fluctuating liquid velocities in the gas/liquid plume zone of a gas-stirred water model ladle were measured with a combined laser Doppler anemometer (LDA) and elec-trical probe technique. The measured turbulence fields, void fraction distribution, and gas and liquid velocities in the plume zone were used for evaluation of various turbulence models. It was found that, among all of the turbulence models tested, only a modified k-ε model, with extra source terms to take into account the generation and dissipation resulting from the inter-action of the bubbles with the liquid, yielded good agreement with both the mean liquid flow field and the turbulent kinetic energy distribution. However, the values of the coefficients orig-inally proposed by their authors were found inapplicable to the bubbly plume situation; more appropriate values of the coefficients were determined based on comparison with experimental measurement.

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Sheng, Y.Y., Irons, G.A. Measurement and modeling of turbulence in the gas/liquid two-phase zone during gas injection. Metall Trans B 24, 695–705 (1993). https://doi.org/10.1007/BF02673185

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