Platonic solids bouncing on a vibrating plate

Trittel, Torsten; Puzyrev, Dmitry; Stannarius, Ralf

doi:10.1103/physreve.109.034903

Phys. Rev. E

2024

DOI: 10.1103/physreve.109.034903

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Platonic solids bouncing on a vibrating plate

Torsten Trittel,

Dmitry Puzyrev,

Ralf Stannarius

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Rotational and translational motions in a homogeneously cooling granular gas

Trittel,

Puzyrev,

Harth

et al. 2024

npj Microgravity

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A granular gas composed of monodisperse spherical particles was studied in microgravity experiments in a drop tower. Translations and rotations of the particles were extracted from optical video data. Equipartition is violated, the rotational degrees of freedom were excited only to roughly 2/3 of the translational ones. After stopping the mechanical excitation, we observed granular cooling of the ensemble for a period of three times the Haff time, where the kinetic energy dropped to about 5% of its initial value. The cooling rates of all observable degrees of freedom were comparable, and the ratio of rotational and translational kinetic energies fluctuated around a constant value. The distributions of translational and rotational velocity components showed slight but systematic deviations from Gaussians at the start of cooling.

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Rotational and translational motions in a homogeneously cooling granular gas

Trittel,

Puzyrev,

Harth

et al. 2024

npj Microgravity

View full text Add to dashboard Cite

show abstract

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Platonic solids bouncing on a vibrating plate

Cited by 1 publication

References 42 publications

Rotational and translational motions in a homogeneously cooling granular gas

Rotational and translational motions in a homogeneously cooling granular gas

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