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Fluid dynamics in bubble stirred ladles: Part I. experiments

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Abstract

Air is supplied through a porous plug placed in the center axis of a cylindrical perspex-water model of a ladle. A Laser-Doppler system is employed to measure radial and axial mean and fluctuating velocities. Velocities in the two-phase bubbly region can also be determined. Velocities are measured near the bottom, half-way up, and near the free surface. It is shown that the bubbles contribute to production of turbulence. The ladle has recirculation zones near the bottom, where the mean velocities are very low. Close to the free surface the radial mean and turbulent velocities are high, promoting mass transfer through the interface. The present measured velocity profiles cannot be reduced to a single profile by employing similarity scaling.

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Author information

Authors and Affiliations

  1. Division of Metallurgy, SINTEF, N-7034, Trondheim, NTH, Norway

    S. T. Johansen (Research Engineer)

  2. Department of Metallurgical Engineering, University of Missouri—Rolla, Foulton Hall, 65401-0249, Rolla, MO

    D. G. C. Robertson (Professor)

  3. Engineer with Sørco Engineering A/S, Alsteinsgt. 7, P.B. 618, N-4001, Stavanger, Norway

    K. Woje

  4. Department of Metallurgy, Technical University of Trondheim, N-7034, Trondheim, NTH, Norway

    T. A. Engh (Professor)

Authors
  1. S. T. Johansen
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  2. D. G. C. Robertson
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  3. K. Woje
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  4. T. A. Engh
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Additional information

Formerly a Visiting Scientist at SINTEF

Formerly Engineer at SINTEF

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Johansen, S.T., Robertson, D.G.C., Woje, K. et al. Fluid dynamics in bubble stirred ladles: Part I. experiments. Metall Trans B 19, 745–754 (1988). https://doi.org/10.1007/BF02650194

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  • DOI: https://doi.org/10.1007/BF02650194

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