Recurrence plots analysis of pressure fluctuations in fluidized beds
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/327581
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
Recurrence plot (RP) and recurrence quantification analysis (RQA), as powerful
statistical techniques, have been used for studying the dynamic behavior of gas-solids
fluidized beds. The method of delays was used to reconstruct the state space attractor to carry
out analysis in the reconstructed state space. In this work, variance of recurrence rate, which
indicates density of recurrence points in RP, against different epoch lengths (time windows)
for time series of pressure fluctuation of fluidized bed was calculated. It was concluded that
the characteristic parameters of RPs could reflect the extent of chaos in fluidization behavior.
The average cycle frequency and entropy as nonlinear dynamical invariants were evaluated
with RQA at different aspect ratios. The estimated entropy showed a similar trend of average
cycle frequency for different aspect ratios. The results also indicated that the entropy and
average cycle frequency are higher in smaller aspect ratios showing that the importance of
the finer structures. In addition, a minimum in average cycle frequency and entropy of the
pressure fluctuations indicated a minimum deviation from periodicity or, in other words, a
minimum deviation from the larger structures, of the bed. The results of this study allow the
deep understanding the fluidized bed hydrodynamics which can then be used for scale up.
CitacióTahmasebpoor, M. [et al.]. Recurrence plots analysis of pressure fluctuations in fluidized beds. A: COUPLED IV. "COUPLED IV : proceedings of the IV International Conference on Computational Methods for Coupled Problems in Science and Engineering". CIMNE, 2011, p. 1054-1061. ISBN 978-84-89925-78-6.
ISBN978-84-89925-78-6
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Coupled-2011-93_Recurrence plots analysis.pdf | 216,8Kb | Visualitza/Obre |