Diffusion in Granular Gases of Viscoelastic Particles

摘要: In most of the literature on granular gases it is assumed that restitution coefficient ∈, which quantifies loss kinetic energy upon a collision independent impact velocity. Experiments as well theoretical investigations show, however, for real materials depends significantly We consider diffusion process in homogeneous gas, i.e. system dissipatively colliding particles. show mean square displacement particles changes drastically if we take velocity dependence e into account. Under oversimplifying assumption constant one finds spread space logarithmically slow with time, whereas realistic due to power law.