RECURRENCE QUANTIFICATION ANALYSIS: A SIMPLE METHOD FOR CHARACTERIZATION OF VARIOUS STRUCTURES IN GAS-SOLID FLUIDIZED BEDS

摘要

A combination of the multi-scale method and the nonlinear analysis method was developed to study the complexity of fluctuation dynamics in fluidized bed. Pressure fluctuations were measured in a fluidized bed of 0.15 m in diameter for sands with mean diameters of 150, 300 and 600 micron and were analyzed using nonlinear recurrence quantification analysis. The results show that RQA can be used as an effective approach to characterize multi-scale flow behavior in the gas-solid fluidized bed.