Visualizing fluidized beds with X-rays

dc.contributor.advisor Theodore J. Heindel
dc.contributor.advisor Robert C. Brown
dc.contributor.advisor Hui Hu
dc.contributor.author Franka, Nathan
dc.contributor.department Mechanical Engineering
dc.date 2018-08-22T17:25:00.000
dc.date.accessioned 2020-06-30T07:43:44Z
dc.date.available 2020-06-30T07:43:44Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.issued 2008-01-01
dc.description.abstract <p>This study applies minimum fluidization velocity experiments, X-ray computed tomography (CT), X-ray stereography, and particle tracking to fluidized beds of glass beads, ground walnut shell, and ground corncob operating with a variety of flow conditions. 3-D local, time-averaged gas holdup is calculated from CT data, while dynamic features are captured by X-ray stereography. The results show that CT is most effective on glass bead fluidized beds. Due to high X-ray attenuation, glass bead CT data has higher resolution than walnut shell and corncob beds. Glass bead gas holdup data also feature the lowest noise due to the high homogeneity of the beads. Conversely, stereography is most effective in corncob and walnut shell fluidized beds. High X-ray penetration in these beds allows clear observation of internal flow features. It is also determined that increasing the superficial gas velocity in the bed decreases the effects of side air injection.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/15340/
dc.identifier.articleid 16339
dc.identifier.contextkey 7024286
dc.identifier.doi https://doi.org/10.31274/rtd-180813-16571
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/15340
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/68964
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/15340/1453162.PDF|||Fri Jan 14 20:39:34 UTC 2022
dc.subject.disciplines Mechanical Engineering
dc.subject.keywords Mechanical engineering
dc.title Visualizing fluidized beds with X-rays
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
thesis.degree.level thesis
thesis.degree.name Master of Science
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