2014/03/19 by Yan Grasselli, Grasselli, Yan, G. Bossis +3 · 1 citation
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #FOS: Physical sciences #Granular flow and fluidized beds #Magnetic and Electromagnetic Effects #Planetary Science and Exploration #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.1403.4767
openalex publication_date 2014/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present an experimental study performed on a vibrated granular gas enclosed into a 2D rectangular cell. Experiments are realized in microgravity. High speed video recording and optical tracking allow to obtain the full kinematics (translation and rotation) of the particles. The inelastic parameters are retrieved from the experimental trajectories as well as the translational and rotational velocity distributions. We report that the experimental ratio of translational versus rotational temperature decreases to the density of the medium but increases with the driving velocity of the cell. These experimental results are compared with existing theories and we point out the differences observed. We also present a model which fairly predicts the equilibrium experimental temperatures along the direction of vibration.