DOI: 10.1051/jp2:1995218
J. Phys. II France 5 (1995) 1883-1899
Noise/Chaos Distinction Applied to the Study of a Fluidized Bed
N. Letaief, C. Rozé and G. GouesbetLESP URA CNRS 230-CORIA, INSA de Rouen, BP08, 76131 Mont-Saint-Aignan Cedex, France
(Received 4 August 1995, revised 1 February 1995, accepted in final form 18 August 1995)
Abstract
The observation of chaos in fluidization have been claimed by some authors. We analyze the dynamics of a gas-solid fluidized
bed and demonstrate that the dynamics is not chaotic but noisy. The random process is studied by using the Hurst analysis
in order to look for long-term correlations in the signals. The dynamics may then be modelled by a fractal Brownian motion
process.
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