title: Velocity distribution in a viscous granular gas.
abstract: We investigate the velocity relaxation of a viscous one-dimensional granular gas in which neither energy nor momentum is conserved in a collision. Of interest is the distribution of velocities in the gas as it cools, and the time dependence of the relaxation behavior. A Boltzmann equation of instantaneous binary collisions leads to a two-peaked distribution, as do numerical simulations of grains on a line. Of particular note is that in the presence of friction there is no inelastic collapse, so there is no need to invoke additional assumptions such as the quasielastic limit.
authors.affiliation: Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, 92093-0340, USA.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Rosas
authors.forename: Daniel
authors.initials: D
authors.lastname: Ben-Avraham
authors.forename: Katja
authors.initials: K
authors.lastname: Lindenberg