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DY: Dynamik und Statistische Physik

DY 17: POSTER I

DY 17.56: Poster

Montag, 27. März 2000, 15:00–18:00, D

Comparative numerical study of granular convection: hydrodynamic fields of granular systems under vertical and horizontal shaking — •Clara Salueña¹, Sergei E. Esipov², and Thorsten Pöschel³ — ¹Humboldt Universität zu Berlin, Intitut für Physik, Invalidenstrsaße 110, 10115 Berlin — ²30 Newport Pkwy., Jersey City, NJ 07310 — ³ICA1, Universität Stuttgart, Pfaffenwaldring 27, 70569

Vibrated granular systems in containers display convective instabilities above a threshold which is velocity dependent. In the 2D numerical results we present, we analyze density, temperature and velocity fields obtained after 1,000 cycles of averaging the motion of 10,000 particles under vertical and horizontal shaking in the fully convective regime. The hydrodynamic fields, collected in computer generated movies, are resolved in time (100 frames per cycle) and reveal very interesting details of the collective dynamics of vibrated granular matter, among these the propagation of shock waves.