Dr. Pavlik Lettinga

Institute for Complex Systems, Forschung Zentrum Julich, Germany and Department of Physics and Astronomy, KU Leuven Belgium

Probing microstructural origin of complex flow behavior

Abstract

Knowledge of the material structure in flow is crucial to understand, predict and tune flow behavior. I will show two examples of structural studies in shear flow. The first example concerns F-actin, which is one of the main building blocks of cells as well as a model system for polymers, because of its meso-scopic size. We use this feature by imaging entangled F-actin in shear flow with fast confocal microscopy. Second, we studied ordered dispersion of colloidal platelets, the most common colloidal system in nature, in shear flow. We used a novel X-ray set-up, which allows 3—D reconstruction of the structure and highlights the effect that confinement has on complex flow behaviour.



Date: 8/7/2015
Time:12:00 (coffee & cookies will be served at 00:00)
Place:FORTH Seminar Room 1