Regensburg 2025 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 21: Granular Matter
DY 21.7: Vortrag
Mittwoch, 19. März 2025, 11:00–11:15, H43
Simulation of Spherical Particles as a Granular Gas in Microgravity: A Comparison with Experimental Results — •Mahdieh Mohammadi1, Torsten Trittel1, Rau'l Cruz Hidalgo2, Dmitry Puzyrev3, Ralf Stannarius1, and Kirsten Harth1 — 1Department of Engineering, Brandeburg University of Applied Sciences, Magdeburger Str. 50, 14770 Brandenburg an der Havel,Germany — 2Departamento de Física y Matemática Aplicada, Facultad de Ciencias , Universidad de Navarra, Pamplona, Spain — 3MTRM, Otto von Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
Simulation of a Granular Gas of Frictional Spherical Particles in Microgravity: A Comparison with Experimental Results
We investigate dilute granular ensembles (granular gases) of rough spheres in Microgravity, both in experiment and simulation. The experiment examines the time scale (Haff time) for energy dissipation in an initially excited granular gas, the collision statistics, and the distribution of angular and translational velocities. We aim to determine how well the experimental results can be reproduced by a DEM simulation. A variety of criteria were tested, including different restitution coefficients. One goal of the simulation is to analyze the effect of different collision parameters on the statistical properties of a granular gas. Second, we aim demonstrate how the model can effectively replicate the experimental data, with a strong correlation between the translation energy in the model and experimental data.
We thank DLR for funding in grants 50WM2242 / 50WM2340.
Keywords: Granular Gas; Microgravity; spherical particles; simulation; collision