Tuning the distance to the equipartition by controlling the collision rate in a driven granular gas experiment

Autor:	Castillo, Gustavo, Merminod, Simon, Falcon, Eric, Berhanu, Michael
Rok vydání:	2020
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.101.032903
Popis:	In a granular gas experiment of magnetized particles confined in a thin layer, the rate of dissipative collisions is tuned by adjusting the amplitude of an external magnetic field. The velocity statistics are analyzed using the dynamic and static structure factors of transverse velocity modes. Using the fluctuating hydrodynamics theory we measure the deviation from kinetic energy equipartition in this out-of-equilibrium system as a function of the dissipative collision rate. When the collision rate is decreased, the distance to equipartition becomes smaller meaning that the dynamical properties of this granular gas approach by analogy those of a molecular gas in thermal equilibrium. Comment: 9 pages, 4 figures Accepted to Physical Review E
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2002.05562 Zobrazit plný text záznamu View this record from Arxiv