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Comparative Surface Thermodynamic Analysis of New Fluid Phase Formation in Various Confining Geometries Open Access


Other title
confining geometry
liquid bridge
capillary evaporation
thermodynamic stability analysis
vapour bridge
confined fluid
capillary condensation
Type of item
Degree grantor
University of Alberta
Author or creator
Zargarzadeh, Leila
Supervisor and department
Elliott, Janet A.W. (Chemical and Materials Engineering)
Examining committee member and department
Zeng, Hongbo (Chemical and Materials Engineering)
Xu, Zhenghe (Chemical and Materials Engineering)
Thundat, Thomas (Chemical and Materials Engineering)
Elliott, Janet A.W. (Chemical and Materials Engineering)
Bhattacharjee, Subir (Mechanical Engineering)
Department of Chemical and Materials Engineering
Chemical Engineering
Date accepted
Graduation date
Master of Science
Degree level
For a pure bulk (unconfined) fluid, phase transition happens at the saturation pressure. In contrast, for a fluid inside a confinement of small size (commonly below micrometers), vapour and liquid coexistence may happen at pressures other than the saturation pressure; or an expected phase transition might be prevented due to tight confinement of a specific geometry. Practical examples include fluids confined in miniaturized systems, catalysts, membranes, and reservoir rocks. This thesis makes a comparative study, using thermodynamic stability analysis, of new phase formation out of a confined fluid, for three different confinement geometries of conical pit, plate‒plate, and sphere‒plate. Both the formation of liquid out of vapour and vapour out of liquid are studied for each geometry. Effects of different parameters: the equilibrium contact angle, the confinement solid separation, and the sphere size for the sphere‒plate case, are investigated. The conclusions of this comparative study are extendable to other geometries.
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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