Regime Transitions in a Fluidized Bed Based on Analyses of Gauge Pressure Fluctuations

摘要

Gauge pressure fluctuations were performed in an air-glass beads fluidized bed in order to identify the boundaries of the main flow regimes. The profile of variance was capable of identifying the onsets of both turbulent fluidization regime (0.905 m/s) and fast fluidization regime (1.6 m/s). The autocorrelation function showed that the minimum fluidization velocity occurred at 0.121 m/s and the transition velocity to bubbling fluidization regime occurred at 0.377 m/s. These transition velocities were confirmed by means of the Kolmogorov entropy algorithm. The same methods will be applied to different systems for preparing a unified flow regime map that can be used in the nuclear fluidized