Some studies on granular gases under chaotic stirring
Talk
Cristobal Lopez
19 de març de 2003 a les 15:00
Sala de Juntes, Ed. Mateu Orfila
We study the spatial structure of a granular material, $N$ particles subject to inelastic mutual collisions, when it is stirred by a bidimensional smooth chaotic flow. A simple dynamical model is introduced where four different time scales are explicitly considered: i) the Stokes time, accounting for the inertia of the particles, ii) the mean collision time among the grains, iii) the typical time scale of the flow, and iv) the inverse of the Lyapunov exponent of the chaotic flow. We also introduce some preliminar studies about a continuum description of the system.
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