Dynamics of gas-solid fluidized beds through pressure fluctuations: A brief examination of methods of analysis
Paper in proceeding, 2011

This paper revisits and critically examines a number of methods used for analysis of in-bed pressure signals recorded in gas-solid fluidized beds. The goal is to obtain information on the time scales of dominant phenomena present in the pressure time series of four fluidization regimes. It is demonstrated that the average cycle time represents an effective alternative to spectral analysis. In addition, we give evidence that the average cycle time yields equivalent information as some of the advanced methods of non-linear analysis (e.g. the Kolmogorov entropy). Finally, by using wavelets and wavelet packets, we show how to obtain an accurate time localization of the different frequency components present in the pressure signal.


Srdjan Sasic

Chalmers, Applied Mechanics, Fluid Dynamics

Marc-Olivier Coppens

John van der Schaaf

Stefan Gheorghiu

Filip Johnsson

Chalmers, Energy and Environment, Energy Technology

Ruud van Ommen

International conference on circulating fluidized beds and fluidized bed technology - CFB10

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