Regensburg 2022 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 11: Granular Matter and Contact Dynamics

DY 11.6: Vortrag

Montag, 5. September 2022, 16:45–17:00, H19

Excitation of Platonic bodies on a vibrating plate analyzed with smart IMUs — •Torsten Trittel, Dmitry Puzyrev, Niklas Dieckmann, and Ralf Stannarius — Otto-von-Guericke Universität Magdeburg

For the investigation of granular gases, i.e. large ensembles of macroscopic particles that interact via frequent mutual collisions, an initial or permanent excitation of the ensembles is prerequisite. Typically, this excitation is realized by one or more vibrating plates (container walls). We investigate such a mechanical excitation of different Platonic bodies, e.g. icosahedra and cubes, and compare their dynamics with that of spherical particles. In earlier experiments with mechanically excited rods [1], the dynamic data were extracted from a huge amount of stereoscopic video data. This procedure is very complicated and time consuming. To overcome this problem, we equipped our particles with small IMUs (inertial measurement units) that are typically used for motion tracking [2]. From acceleration and rotation data, it is straightforward to calculate the rotational and translational energies of each jump. We present distributions of the energies on individual degrees of freedom and determine the efficiency of the excitation depending on vibration parameters. Finally, we compare the experimental findings with results obtained from numerical simulations.

[1] T. Trittel et al., Mechanical excitation of rodlike particles by a vibrating plate, Phys. Rev. E 95, 062904, (2017)

[2] M. Zenker, Dynamik platonischer Körper bei mechanischer Anregung, BA, Magdeburg (2021)