State space analysis, a tool for progress

Briongos, Javier Villa; Soler, Jesús Guardiola

doi:10.1016/s1570-7946(05)80129-4

Cited by 3 publications

(1 citation statement)

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“…During past decades deterministic chaos analysis has become a popular tool in chemical engineering for studying complex systems like fluidized beds or bubble columns, so it is not surprising to find work where time, frequency domain, and state-space analysis are used complementarily to characterize the underlying dynamics of these systems (Villa Briongos and Soler 2005).…”

Section: Introductionmentioning

confidence: 99%

Experimental Fluid Dynamics Study in a Fluidized Bed by Deterministic Chaos Analysis

Castilho

Cremasco

Martín

et al. 2011

Particulate Science and Technology

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Differential pressure fluctuations in gas-solid fluidized beds were analyzed by chaos analysis (construction of attractors, correlation dimension, Kolmogorov entropy) and mutual information. Experimental fluidization tests of three different particles were conducted. Two of them are from Geldart group B and one from Geldart group D. The fluidization experiments were performed in a cylindrical bed with 0.07 m i.d. and 1.0 m high. Pressure fluctuations were measured by three pressure transducers, and their signal time series were analyzed in the time domain (mean and standard deviation) and in the frequency domain (power spectra) for comparison and complementation of chaos analysis. Analyses in the time domain allowed a good estimation for determining whether or not the system is fluidized. The Fourier spectra provided more detailed information that could identify other phenomena such as the presence of bubbles. The chaos tools produced sensitive results, offering a qualitative and quantitative analysis for identification of the phenomena that occur in fluidization. Three different fluidization regimes could be indentified: multiple bubble bed, slugging bed, and exploding bubble bed.

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Section: Introductionmentioning

confidence: 99%