EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||07 June 2021|
Magnetically heated granular gas in a low-gravity environment
Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft-und Raumfahrt (DLR), 51170 Cologne, Germany
2 Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany
3 Max-Planck-Institut für Dynamik und Selbstorganisation, 37077, Göttingen, Germany
4 Hypatia Science Consulting, 37081, Göttingen, Germany
Published online: 7 June 2021
Magnetic forces are used to heat up thousands of spherical particles under low-gravity. This long range external excitation, combined with the induced particle-particle interactions, results in a homogeneous spatial distribution of the particles. Comparisons with predictions of kinetic theories can hence be carried out. Haff’s cooling law is verified qualitatively, while the measured cooling time scale is quantitatively different from the prediction. The high velocity tail of the velocity distribution during homogeneous cooling state (HCS) is measured, while the expected cluster formation after HCS can not be verified by our experiment.
A video is available at https://doi.org/10.48448/3tw5-d751
© The Authors, published by EDP Sciences, 2021
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