A 1-D Granular Gas as a Knudsen Gas
CHILE UNIV SANTIAGO DEPT DE FISICA
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We study a one-dimensional system of inelastic hard particles driven by thermal walls. For low dissipation in collisions the system may be treated as a perturbation on a non-interacting system, being thus conceptually similar to a Knudsen gas. When the quasielastic system is subjected to gravity a kinetic theory approach is suitable, giving a faithful description of results stemming from Newtonian molecular dynamics simulations. Effects derived from the finite size of the particles nay be taken into account without invalidating the rarefied system assumption. When the system is not subject to gravity and held between two thermal walls, the boundary conditions determine whether the system will be fluidized or clusterized. The transition from the clustering regime to the fluidized state is described.
- Physical Chemistry
- Fluid Mechanics