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Buoyancy considerations in a fluidized bed of ground particles
Descriptive
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Text
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Title
Buoyancy considerations in a fluidized bed of ground particles
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ETD_1940
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051890
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eng
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theses
Subject
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Topic
Mechanical and Aerospace Engineering
Subject
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(authority = ETD-LCSH)
Topic
Fluidization
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Fluid dynamics
Abstract
The research conducted for this thesis determines and quantifies the forces acting on a large submerged object in a gas-solid fluidized bed of Geldart A ground particles at the onset of bubbling. In particular, the additional load from the previously reported de-fluidized region of particles found above submerged objects in fluidized beds is quantified. A force model was developed and comparisons between this and the experimental data yielded properties of the de-fluidized region, such as the shape and height of the hood, and the angle to which it rises. Drag is measured by comparing forces on objects of different geometries subject to the same conditions. Buoyancy was measured by summing the pressure force acting to push the submerged object out of the bed and the counteracting pressure force of the bed over the submerged object pushing it deeper into the bed. The de-fluidized region is found to have a significant impact on the buoyancy of the object by creating an additional weight force above the object thus increasing the pressure in this region. Explanations for the hood shape and size are made through phenomenological results obtained through visual observations. Particle transport through voidage collapses at the surface, i.e. “bubbling”, create a secondary particle circulation within the bed adding particles to the top of the hood. The size of the bubbles appears to determine the extent of the hood.
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electronic resource
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vi, 79 p. : ill.
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Note
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M.S.
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Includes bibliographical references (p. 78-79)
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by Prakash R. Rao
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Rao
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Prakash R.
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1982-
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Prakash R. Rao
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Muller
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Michael
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chair
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Advisory Committee
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Michael R Muller
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Cook-Chennault
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Kimberly
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internal member
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Kimberly Cook-Chennault
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Bagchi
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Prosenjit Bagchi
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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OriginInfo
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2009
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2009-10
Place
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xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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doi:10.7282/T35H7GF3
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ETD graduate
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Rights
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The author owns the copyright to this work
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Copyright protected
Notice
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Open
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Permission or license
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Rao
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Prakash
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Prakash Rao
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Rutgers University. Graduate School - New Brunswick
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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931840
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