Investigation into the hydrodynamics of gas–solid fluidized beds using particle image velocimetry coupled with digital image analysis

Authors

  • Jan Albert Laverman,

    1. Faculty of Science and Technology, IMPACT, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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  • Ivo Roghair,

    1. Faculty of Science and Technology, IMPACT, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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  • Martin van Sint Annaland,

    Corresponding author
    1. Faculty of Science and Technology, IMPACT, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
    • Faculty of Science and Technology, IMPACT, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Hans Kuipers

    1. Faculty of Science and Technology, IMPACT, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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Abstract

The hydrodynamics of a freely bubbling, pseudo 2-D fluidized bed has been investigated experimentally for different bed aspect ratios at different superficial gas velocities by using Particle Image Velocimetry (PIV) combined with Digital Image Analysis (DIA). Coupling of both non-invasive measuring techniques allows us to obtain information on both the bubble behaviour and emulsion phase circulation patterns simultaneously. In particular, the combination of DIA with PIV allows to correct for the influence of particle raining through the roof of the bubbles on the time-averaged emulsion phase velocity profiles.

Abstract

On a étudié de façon expérimentale l'hydrodynamique d'un lit fluidisé pseudo 2-D en bouillonnement libre, pour différents rapports de forme de lits à différentes vitesses de gaz superficielles par vélocimétrie à images de particules (PIV) combinée à l'analyse d'images numériques (DIA). Le couplage de deux techniques de mesure non invasives nous permet d'obtenir de l'information sur le comportement des bulles et les schémas de circulation de la phase d'émulsion, simultanément. En particulier, la combinaison de DIA et de PIV permet de corriger l'influence de la pluie de particules s'écoulant du toit de bulles sur les profils de vitesse de la phase d'émulsion moyennés dans le temps.

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