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

Alzahrani, Faris and Aldehani, Mohammed and Rusi, Hao and McMaster, Michael and Abreu Fernandes, Daniel Luis and Assabumrungrat, Suttichai and t Saoir, Meabh Nic An and Aiouache, Farid (2015) Gas flow visualisation in low aspect ratio packed beds by three-dimensional modelling and near-infrared tomography. Industrial and Engineering Chemistry Research, 54 (51). pp. 12714-12729. ISSN 0888-5885

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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

Item Type:
Journal Article
Journal or Publication Title:
Industrial and Engineering Chemistry Research
Additional Information:
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
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2209
Subjects:
ID Code:
77331
Deposited By:
Deposited On:
16 Dec 2015 10:26
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Jul 2020 04:09