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Clustering in Gas-Fluidized Riser Flows of Flexible Fibers
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  • Dandan Xu,
  • Bo Wang,
  • Zhaosheng Yu,
  • Yu Guo
Dandan Xu
Zhejiang University of Technology

Corresponding Author:xudandan@zjut.edu.cn

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Bo Wang
Zhejiang University of Technology
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Zhaosheng Yu
Zhejiang University
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Yu Guo
Zhejiang University
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Abstract

Clustering of flexible fibers in riser flows is investigated using a hybrid approach of Discrete Element Method and Computational Fluid Dynamics. Unlike spherical particles, the flexible fibers possess elongated shape, undergo significant deformation, and dissipate kinetic energies through rapid fiber deformation. The present studies show that these distinct features have significant impacts on the cluster characteristics of the fibers. An increased fiber aspect ratio leads to an increase in number and size of agglomerates, while it causes a reduction in heterogeneity of solids distribution due to the more dilute clusters with reduced packing densities. As the fibers become more flexible, the heterogeneity increases, and denser clusters are obtained. More significant effects of the fiber flexibility on the clustering are observed for the fibers with larger aspect ratios. The increased energy dissipation through the rapid fiber deformation enhances the clustering by augmenting the number and size of the agglomerates.
19 Aug 2022Submitted to AIChE Journal
19 Aug 2022Submission Checks Completed
19 Aug 2022Assigned to Editor
27 Aug 2022Reviewer(s) Assigned
18 Oct 2022Review(s) Completed, Editorial Evaluation Pending
02 Nov 2022Editorial Decision: Revise Major
05 Dec 20221st Revision Received
06 Dec 2022Review(s) Completed, Editorial Evaluation Pending
06 Dec 2022Submission Checks Completed
06 Dec 2022Assigned to Editor
08 Dec 2022Reviewer(s) Assigned
03 Jan 2023Editorial Decision: Accept