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  • IECR_paper_2015_November_revision_AF_published_version

    Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial and Engineering Chemistry Research, copyright ©2016 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.iecr.5b02635

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    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Gas flow visualisation in low aspect ratio packed beds by three-dimensional modelling and near-infrared tomography

Research output: Contribution to journalJournal article

Published
  • Faris Alzahrani
  • Mohammed Aldehani
  • Hao Rusi
  • Michael McMaster
  • Daniel Luis Abreu Fernandes
  • Suttichai Assabumrungrat
  • Meabh Nic An t Saoir
  • Farid Aiouache
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<mark>Journal publication date</mark>30/12/2015
<mark>Journal</mark>Industrial and Engineering Chemistry Research
Issue number51
Volume54
Number of pages16
Pages (from-to)12714-12729
Publication statusPublished
Early online date10/12/15
Original languageEnglish

Abstract

Nonuniform local flow inside randomly porous media of gas-solid packed beds of low aspect ratios ranging from 1.5 to 5 was investigated by three-dimensional modelling and near-infrared tomography. These beds are known to demonstrate heterogeneous mixing and uneven distributions of mass and heat. The effects of the confining wall on flow dynamics were found nonlinear, particularly for aspect ratios lower than 3. High velocities were mainly observed in regions near the wall of aspect ratio value of 1.5 and those of values higher than 3, owing to high local porosities in these zones. Mass dispersion characterised by both experimental near-infrared imaging and by particle tracking showed discrepancies with literature models, particularly for aspect ratios lower than 3. Uncertainties were more significant with the radial dispersion due bed size limits. Beyond this value, the wall affected more the axial dispersion, confirming the nonlinear impact of the wall on global hydrodynamics

Bibliographic note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial and Engineering Chemistry Research, copyright ©2016 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.iecr.5b02635