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Müller CR, Hartung G, Hult J, Dennis JS, Kaminski CF, "Laser Diagnostic Investigation of the Bubble Eruption Patterns in the Freeboard of Fluidized Beds: Simultaneous Acetone PLIF and Stereoscopic PIV Measurements", AICHE JOURNAL 55(6), 1369-1382, 2009, DOI:10.1002/aic.11802, | pdf 


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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