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A new technique for in-situ measurements of bubble characteristics in bubble columns operated in the heterogeneous regime

Author

Listed:
  • Pedro Maximiano Raimundo

    (UGA [2016-2019] - Université Grenoble Alpes [2016-2019], IFPEN - IFP Energies nouvelles, LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] - Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology - CNRS - Centre National de la Recherche Scientifique - UGA [2016-2019] - Université Grenoble Alpes [2016-2019])

  • Alain H. Cartellier

    (LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] - Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology - CNRS - Centre National de la Recherche Scientifique - UGA [2016-2019] - Université Grenoble Alpes [2016-2019])

  • Davide Beneventi

    (LGP2 - Laboratoire Génie des procédés papetiers - Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology - INPG - Institut National Polytechnique de Grenoble - CNRS - Centre National de la Recherche Scientifique)

  • Ann Forret

    (IFPEN - IFP Energies nouvelles)

  • Frédéric Augier

    (IFPEN - IFP Energies nouvelles)

Abstract

In order to characterize bubbles in dense, heterogeneous bubbly flows such as those encountered in industrial bubble columns, a new measuring technique based on the spatial correlation of phase indicator functions is proposed. By analyzing its principle of operation, it is shown that the correlation coefficient decreases with the ratio of the distance between two optical probes to the bubble size. Hence for a known distance, the bubble size, and more precisely the Sauter mean horizontal diameter of bubbles is accessible. A dedicated sensor has been designed using conical mono-fiber optical probes. It has been compared to alternate measuring techniques in the complex bubbly flows produced in an I.D. 400 mm bubble column with gas superficial velocities from 3 to 35 cm/s. The performances of the correlation sensor happen to be quite satisfactory, with typical uncertainties about 15–20%, and even less (

Suggested Citation

  • Pedro Maximiano Raimundo & Alain H. Cartellier & Davide Beneventi & Ann Forret & Frédéric Augier, 2016. "A new technique for in-situ measurements of bubble characteristics in bubble columns operated in the heterogeneous regime," Post-Print hal-01451421, HAL.
    • Handle: RePEc:hal:journl:hal-01451421
    DOI: 10.1016/j.ces.2016.08.041
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