Regensburg 2000 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 24: Granulare Materie II

DY 24.3: Vortrag

Dienstag, 28. März 2000, 15:00–15:15, H2

Granular materials and their application to particle damping technology in industry — •Clara Salueña¹, Thorsten Pöschel², and Sergei E. Esipov³ — ¹Humboldt Universität zu Berlin, Intitut für Physik, Invalidenstrsaße 110, 10115 Berlin — ²ICA1, Universität Stuttgart, Pfaffenwaldring 27, 70569 — ³30 Newport Pkwy., Jersey City, NJ 07310

Particle dampers have been used in aerospace engineering for decades, for its robustness and responsiveness under harsh environmental conditions. Their practical interest encounters however a lack of theoretical models for dense granular systems. Here we show that the (numerical) analysis of systems of vibrated material particles reveals different dissipative regimes which can be mapped into a gas-, liquid- and solid-like phases [1]. Numerical simulations help to understand particle damping and find higher scale theoretical models -where the details of grain motion are irrelevant, which can be used to model the response of a granular damper [2].

[1] C. Saluena, S. E. Esipov and T. Pöschel. Dissipative properties of vibrated granular materials. Phys. Rev. E 59, 4422-4425 (1999).

[2] C. Saluena, S. E. Esipov, D. Rosenkranz and H. V. Panossian. Proceedings of the SPIE’s Conference on Smart Structures and Materials, Passive Damping and Isolation, 3672 (1999).