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Permanent link (DOI): https://doi.org/10.7939/R3H65G

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Direct simulations of spherical particle motion in non-Newtonian liquids Open Access

Descriptions

Other title
Subject/Keyword
Sedimentation
Thixotropy
Lid-driven cavity
Simulation
Bingham
Lattice-Boltzmann
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Prashant, .
Supervisor and department
Derksen, Jos (Chemical and Materials Engineering)
Examining committee member and department
Lange, Carlos F. (Mechanical Engineering)
Semagina, Natalia (Chemical and Materials Engineering)
Sanders, Sean (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2009-10-02T20:36:16Z
Graduation date
2009-11
Degree
Master of Science
Degree level
Master's
Abstract
The present work deals with the development of a direct simulation strategy for solving the motion of spherical particles in non-Newtonian liquids. The purely viscous (non-elastic) non-Newtonian liquids are described by Bingham and thixotropy models. Validation of the strategy is performed for single phase (lid driven cavity flow) and two phase flows(sphere sedimentation). Lid driven cavity flow results illustrate the flow evolution of thixotropic liquid and subtle differences between thixotropic rheology and pseudo Bingham rheology. Single sphere sedimentation in Bingham liquid is shown to be influenced by the yield stress of the liquid. Time-dependent properties such as aging prominently affect the settling of a sphere in thixotropic liquid. The hydrodynamic interactions between two spheres are also studied at low and moderate Reynolds numbers. In thixotropic liquid, an intriguing phenomenon is observed where the separation distance between the spheres first increases and then rapidly decreases.
Language
English
DOI
doi:10.7939/R3H65G
Rights
License granted by . Prashant (pr6@ualberta.ca) on 2009-10-02T02:39:35Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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