Experimental study on solids circulation patterns and bubble behavior using particle imagevelocimetry combined with digital image analysis

J.A. Laverman, Ivo Roghair, M. van Sint Annaland, J.A.M. Kuipers

    Research output: Contribution to conferencePaper

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    Abstract

    The hydrodynamics, viz. the solids circulation patterns and bubble behavior, of a freely bubbling gas-solid fluidized bed has been investigated experimentally using Particle Image Velocimetry (PIV) combined with Digital Image Analysis (DIA). Coupling of these non-invasive measuring techniques allows us to obtain information on both the bubble behavior and emulsion phase circulation patterns simultaneously, in order to study in detail their intricate interaction. In particular, the combination of DIA with PIV allows correcting for the influence of particle raining through the roof of the bubbles on the time-averaged emulsion phase velocity profiles. Because of the required visual access, this technique can only be applied for pseudo-2D fluidized beds. The bubble rise velocity as a function of the equivalent bubble diameter and the average bubble diameter as a function of the position above the distributor were determined with DIA and compared with literature correlations. Subsequently, the importance was demonstrated of filtering the instantaneous emulsion phase velocity profiles obtained with PIV for particle raining, using DIA, to obtain the time-averaged emulsion phase velocity profiles. The timeaveraged solids circulation patterns have been studied as a function of the superficial gas velocity and bed aspect ratio
    Original languageUndefined
    Number of pages10
    Publication statusPublished - 2008
    Event6th International Conference on CFD in the Oil & Gas, Metallurgical and Process Industries 2008 - Trondheim, Norway
    Duration: 10 Jun 200812 Jun 2008

    Conference

    Conference6th International Conference on CFD in the Oil & Gas, Metallurgical and Process Industries 2008
    CountryNorway
    CityTrondheim
    Period10/06/0812/06/08
    Other10-12 June 2008

    Keywords

    • IR-68590
    • PIV
    • Hydrodynamics
    • DIA
    • fluidized bed

    Cite this

    Laverman, J. A., Roghair, I., van Sint Annaland, M., & Kuipers, J. A. M. (2008). Experimental study on solids circulation patterns and bubble behavior using particle imagevelocimetry combined with digital image analysis. Paper presented at 6th International Conference on CFD in the Oil & Gas, Metallurgical and Process Industries 2008, Trondheim, Norway.