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DY: Dynamik und Statistische Physik

DY 24: Granular Matter

DY 24.4: Vortrag

Samstag, 5. März 2005, 15:00–15:15, TU H2032

Sound propagation in dense granular media — •Stefan Luding and Orion Mouraille — Particle Technology, DCT, TUDelft, Julianalaan 136, 2628 BL

The goal of the presented research is to understand information propagation in dense assemblies of spherical, polydisperse granular media. Using a discrete element method (DEM) simulation, the wave propagation is studied. After relaxation to an isotropic static equilibrium state, a wave is agitated by moving one side wall. First, the effect of the contact force-law is examined for a cubic sample; second, the effects of singular and periodic agitations are studied with Fourier analysis; third, pressure effects and an-isotropy are examined.