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Laser diagnostic investigation of the bubble eruption patterns in the freeboard of fluidized beds: Simultaneous acetone PLIF and stereoscopic PIV measurements

Authors

  • C. R. Müller,

    Corresponding author
    1. Dept. of Chemical Engineering, Pembroke Street, University of Cambridge, Cambridge, CB2 3RA, U.K
    • Dept. of Chemical Engineering, Pembroke Street, University of Cambridge Cambridge, CB2 3RA, U.K
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  • G. Hartung,

    1. Dept. of Chemical Engineering, Pembroke Street, University of Cambridge, Cambridge, CB2 3RA, U.K
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  • J. Hult,

    1. Dept. of Chemical Engineering, Pembroke Street, University of Cambridge, Cambridge, CB2 3RA, U.K
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  • J. S. Dennis,

    1. Dept. of Chemical Engineering, Pembroke Street, University of Cambridge, Cambridge, CB2 3RA, U.K
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  • C. F. Kaminski

    1. Dept. of Chemical Engineering, Pembroke Street, University of Cambridge, Cambridge, CB2 3RA, U.K
    2. Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany
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Abstract

For the first time PIV has been applied simultaneously with acetone-PLIF in the freeboard of a fluidized bed. Here, the eruption profile of single bubbles and a continuous stream of bubbles were studied. As stereoscopic PIV was applied the out-of-plane component of the velocity was also measured. The out-of-plane component is not negligible. The observed bubble eruption patterns were in general agreement with the bubble model of Levy and Lockwood,24 Yorquez-Ramirez and Duursma5 and Solimene et al.1 No qualitative difference between the eruption of a single bubble and a stream of bubbles was observed. Based on the calculated vorticity of the gas in the freeboard, it was found that the bubble induced turbulence decays fairly rapidly. © 2009 American Institute of Chemical Engineers AIChE J, 2009

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