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Permanent link (DOI): https://doi.org/10.7939/R3WW99

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Buckling of a thin, viscous film in an axisymmetric geometry Open Access

Descriptions

Other title
Subject/Keyword
viscous
shear
buckling
aximmetric
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Bhattacharya, Sanjay
Supervisor and department
Flynn, Morris (Mechanical Engineering)
Examining committee member and department
Flynn, Morris (Mechanical Engineering)
Heimpel, Moritz (Physics)
Mitra, Sushanta (Mechanical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2012-11-30T13:45:15Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
An experimental study of the shear-induced buckling of a thin, viscous film in an axisymmetric geometry is presented. Rotating the inner boundary relative to a stationary outer one, generates large in-plane shear forces in the laterally constrained millimetric film, which leads to buckling of the viscous layer manifest as waves on the film surface. Regarding as independent variables the rotation rate, the gap width between the inner and outer boundaries and the film thickness and viscosity, the focus is on determining the number of waves excited plus their phase speed and amplitude by post-processing the experimental images in MATLAB. Experimental measurements of the number of waves excited, in the region between the onset of instability and the point of wave breaking, matches well with analogue predictions derived from an adaptation of the Foppl von Karman equation, which was originally developed to consider the wrinkling of an elastic membrane.
Language
English
DOI
doi:10.7939/R3WW99
Rights
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 these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before 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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