Berlin 2005 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 34: Poster

DY 34.93: Poster

Montag, 7. März 2005, 15:30–18:00, Poster TU D

Investigations of horizontally shaken granular materials – the brazil-nut effect and nonspherical particles — •Olaf Brökmann und Achim Kittel — Carl-von-Ossietzky Universität Oldenburg, Institut für Physik, 26111 Oldenburg

We investigated horizontally shaken granular material. The studies include an analysis of the velocity fields of the granular material. Therefore particle image velocimetry (PIV) is used, a measuring method which is usually used for investigation of flow fields in fluids. One aspect of our research is the investigation of the so called brazil-nut effect, i.e. the rise of larger particles in a granular bed. We found results concerning its origin and features. Other results were obtained by investigating nonspherical granular materials. The investigation of shaken rice uncovers interesting features like the formation of layers with horizontal and vertical orientated rice grains.