Induced correlations and rupture of molecular chaos by anisotropic dissipative Janus hard disks

Abstract

A system of smooth "frozen" Janus-type disks is studied. Such disks cannot rotate and are divided by their diameter into two sides of different inelasticities. Taking as a reference a system of colored elastic disks, we find differences in the behavior of the collisions once the anisotropy is included. A homogeneous state, akin to the homogeneous cooling state of granular gases, is seen to arise and the singular behavior of both the collisions and the precollisional correlations are highlighted. arXiv:1906.02262v1 [cond-mat.soft]

Memory effects in a gas of viscoelastic particles

“…We also show this is due to the existing coupling between cumulants and temperature, which induces its direction. Furthermore, both memory effects arising from a coupling of the granular temperature with a 2 and a 3 represents a step towards a unifying description of memory effects in the context of granular dynamics and opens new avenues for the study of more sophisticated systems like the ones composed by anisotropic particles [41,42,43].…”