Chaotic behavior of gas‐solids flow in the riser of a laboratory‐scale circulating fluidized bed

Abstract

van den, C. M. (1997). Chaotic behavior of gassolids flow in the riser of a laboratory-scale circulating fluidized bed. AIChE Journal, 43(6), 1458-1468. DOI: 10.1002/aic.690430609 DOI:10.1002/aic.690430609 Document status and date:Published: 01/01/1997 Document Version:Publisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement: www.tue.nl/taverne Take down policyIf you believe that this document breaches copyright please contact us at: openaccess@tue.nl providing details and we will investigate your claim.

Two-Phase Bubble Columns: A Comprehensive Review

“…These methods are based on the analysis of ε G data. Other flow regime identification methods are the fractal [319], wavelet [320,321], Hurst's [322,323], spectral and nonlinear chaos [93,320,[324][325][326][327][328][329][330][331][332][333] and Kolmogorov entropy [332][333][334] approaches. Some authors have used methods based on the Shannon entropy, which measures the degree of indeterminacy in a system [335,336].…”

Gas‐solids flow structures in a novel circulating‐turbulent fluidized bed

“…30,31 To further explore the links between the fluctuations of solids concentrations and the interaction between the gas-solids phases, probability density distribution (PDD) analyses were carried out at Z 5 2.2 m and five different radial positions. Typical PDD curves of local solids concentration signals were illustrated in Figure 9.…”

A Comparison of Flow Dynamics and Flow Structure in a Riser and a Downer

“…There was strong cyclic behavior due to large clusters in the wall region of the development section (see Fig. 4) which caused more structured behavior in the time series, and therefore low D. The local flow behavior of clusters was generally more regular than for dispersed particles [6,21], since dispersed particles flow more freely and intermittently, and therefore, are more chaotic. A high K generally corresponded to a low H, so that trends in profiles of H were opposite to those of K. In summary, in general the trends of the profiles of the chaos parameters fluctuated more than those of time-averaged solids concentration and may reflect the time-dependent dynamic behavior.…”