Thermodynamics of bouncing grains & Büttiker-Landauer motor

Experiments Sand grains bouncing over a vibrated plate diffuse across the plate's surface. Their diffusivity depends on the plate's surface properties, on the frequency and amplitude of its vibration, and on the grains' shape. This phenomenon generates the well-known Chladni figure. This archive contains the trajectories of bouncing grains recorded during the experiments presented in two articles: A granular Büttiker-Landauer motor, O. Devauchelle, P. Popović, P. Szymczak, A. Abramian & A. Lazarus, PRL (2026), DOI: 10.1103/1ggv-8f83; Thermodynamics of bouncing grains, O. Devauchelle, P. Popović, P. Szymczak, A. Abramian & A. Lazarus (2026). File content Codes Python codes used to produce and analyse the trajectories. Processed data Trajectory files *.traj. Text files intended to be read with the BrownTrack library. See code sample below for illustration. Background image background.jpg. Geometry of the setup in the corresponding movie frame domains.json. Parameter files *.json. Raw data Data files created during the experiment. Tilt of the vibrating plate angle_*.csv. Metadata of all movies in specific run movie_metadata_*.json. Raw parameter file parameters_*.json. Names of experimental runs The runs are referred to with letters in the articles, according to the following table. Run name File A big_grains_40Hz B siloxane_multiple_quick_3 C siloxane_big_grains_large_swing D siloxane_small_low_freq E siloxane_multiple_quick F siloxane_multiple_quick_2 G siloxane_small_grains H siloxane_small_large_amp I diffusivity_hard_30Hz_1_5_mm J diffusivity_soft_30Hz_2_5_4_mm K diffusivity_hard_30Hz_2_5_4_mm L diffusivity_soft_30Hz_6_mm M diffusivity_hard_30Hz_6_mm N diffusivity_soft_30Hz_1_5_mm Example The code sample below loads all the trajectories of a specific experimental movie, and plots some of them.