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Identifier 000405330
Title Yielding and particle rearrangements in hard sphere glasses
Alternative Title Μηχανισμοί διαρροής και μικροσκοπική δυναμική σε κολλοειδείς υάλους υπό διάτμηση
Author Jacob, Alan Ranjit
Thesis advisor Πετεκίδης, Γεώργιος
Reviewer Φυτάς, Γεώργιος
Βλασσόπουλος, Δημήτριος
Βαμβακάκη, Μαρία
Benoit, Loppinet
Jan, Mewis
Thomas, Voigtmann
Abstract A very high concentration or volume fraction of colloidal hard spheres (_ >0:58) dispersed in a continuous medium, characterized by the long lived entropic caging of colloidal particles by its neighbours, is termed a colloidal glass. This is a metastable state where the inherent relaxation time of the system deviates to infinity and the study of such systems under flow has garnered immense attention. In this work, we employ rheology and BD simulations to probe the linear and non-linear viscoelastic properties at rest and under shear. We also perform rheological experiments to probe aging as well as non-linear transient behaviour of colloidal glasses. Orthogonal superposition rheometery is utilized to understand the effect of inter particle potential on steady shear of hard sphere and soft colloidal glasses. Furthermore, we verify the presence and investigate different types of glasses existing in asymmetric binary mixtures with the help of BD simulations.
Language English
Subject Brownian Dynamics simulations
Colloidal Glass
Rheology
Size Asymmetric Binary Glass
Ασύμμετρος Ύαλος
Γήρανση
Ερπυσμός
Προσομοιώσεις Brownian Δυναμικής
Ταλαντωτική Διάτμηση Υψηλών Συχνοτήτων
Issue date 2017-02-10
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Materials Science and Technology--Doctoral theses
  Type of Work--Doctoral theses
Permanent Link https://elocus.lib.uoc.gr//dlib/0/c/9/metadata-dlib-1495192611-632892-8829.tkl Bookmark and Share
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