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Korean Journal of Chemical Engineering, Vol.16, No.6, 784-788, 1999
Particle Flow Behavior in Three-Phase Fluidized Beds
Non-uniform flow behavior of fluidized solid particles in three-phase fluidized beds has been analyzed by adopting the stochastic method. More specifically, pressure fluctuation signals from three-phase fluidized beds (0.152 m ID x 2.5 m in height) have been analyzed by resorting to fractal and spectral analysis. Effects of gas flow rate (0.01-0.07 m/s), liquid flow rate (0.06-0.18 m/s) and particle size (0.001-0.006 m) on the characteristics of the Hurst exponent, spectral exponent and Shannon entropy of pressure fluctuations have been investigated. The Hurst exponent and spectral exponent of pressure fluctuations attained their local maxima with the variation of liquid flow rate. The Shannon entropy of pressure fluctuation data, however, attained its local minima with the variation of liquid flow rate. The flow transition of fluidized solid particles was detected conveniently by means of the variations of the Hurst exponent, spectral exponent and Shannon entropy of pressure fluctuations in the beds. The flow behavior resulting from multiphase contact in three-phase fluidized beds appeared to be persistent and can be characterized as a higher order deterministic chaos.
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[Cited By]
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- Kim HJ, Chang KS, Korean Journal of Chemical Engineering, 18(5), 623, 2001
- Nam SH, Cho YJ, Kang Y, Choi HS, Kim SD, HWAHAK KONGHAK, 38(6), 859, 2000
- Park SH, Kim SD, Korean Journal of Chemical Engineering, 18(6), 1015, 2001
- Kim SJ, Cho YJ, Lee CG, Kang Y, Kim SD, Korean Journal of Chemical Engineering, 19(1), 175, 2002
- Lee JK, Shin JH, Korean Journal of Chemical Engineering, 19(2), 267, 2002
- Park SH, Kim SD, Korean Journal of Chemical Engineering, 20(1), 121, 2003
- Han HD, Lee W, Kim YK, Kwon JL, Choi HS, Kang Y, Kim SD, Korean Journal of Chemical Engineering, 20(1), 163, 2003
- Lee JK, Shin JH, Korean Journal of Chemical Engineering, 20(3), 572, 2003
- Park SH, Korean Journal of Chemical Engineering, 21(5), 1066, 2004
- Cho YZ, Yang HC, Kang Y, Korean Journal of Chemical Engineering, 26(3), 828, 2009
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