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Caros usuários.
Face a uma reunião da PROPG agendada para manhã de hoje a secretaria do PPGFSC estará fechada das 9:45 às 12 horas.
Reabriremos às 14 horas.
Atenciosamente.
Coordenadoria do Programa de Pós-Graduação em Física
Fone: (48) 3721-2308
site: ppgfsc.posgrad.ufsc.br
THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:
A Mode Coupling Theory for the Rheology of Colloidal Glasses
Dr. Christian P. Amann
Universität Konstanz
Abstract:
“What is a glass?” Starting from the Smulochowsky equation, mode coupling theory (MCT) is a powerful tool to approximate the collective dynamics of simple liquids near their glass transition via the dynamics of density fluctuations. It provides conceptual answers for the opening question and yields a qualitative and quantitative description of glassy dynamics in and out-of equilibrium. In this work, MCT with integration through the transient dynamics (ITT) was used to calculate the rheological response of a dense colloidal dispersion to start-up shear flow. It is possible to predict the whole range of non-monotonous stress response from the elastic,
via the transient, into the steady state (and to compare to experiments). The distortion of the structure-factor can also be calculated and a close connection between the distortion symmetry and the non-monotonous stress response is observed, which can provide an interpretation for the microscopic processes involved. The concept, applied to hard-sphere colloids, can be generalized to other short-range interaction potentials, once the equilibrium structure factor, as only input quantity needed, is provided.
Date: 11/July/2014 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10h:15min
The Physics Graduate Program invites everyone to:
Defence of M.Sc. dissertation
Bruno Clasen Hames
Polarização Intramolecular e Separação de Carga em Estruturas Supramoleculares
Defense Commitee
Prof. Dr. Luis Guilherme de Carvalho Rego – (president) – FSC/UFSC
Prof. Dr. Marcio Henrique Franco Bettega – (external member) – FSC/UFPR
Prof. Dr. Frederico Firmo de Souza Cruz – (local member) – FSC/UFSC
Prof. Dr. Clederson Paduani – (local member) – FSC/UFSC
Prof. Dr. Kahio Tibério Mazon – (supplementary member) – FSC/UFSC
Prof. Dr. Thiago de Cacio Luchese – (supplementary member) – FSC/UFFS
Date: 03/July/2014 – thursday – Time: 14:30 pm – Place: Sala 114 – Sala de Reuniões do Departamento de Física
