title: Coarsening of "clouds" and dynamic scaling in a far-from-equilibrium model system.
abstract: A two-dimensional lattice gas of two species, driven in opposite directions by an external force, undergoes a jamming transition if the filling fraction is sufficiently high. Using Monte Carlo simulations, we investigate the growth of these jams (''clouds''), as the system approaches a nonequilibrium steady state from a disordered initial state. We monitor the dynamic structure factor S(k{x},k{y};t) and find that the k{x}=0 component exhibits dynamic scaling, of the form S(0,k{y};t)=t;{beta}S[over](k{y}t;{alpha}) . Over a significant range of times, we observe excellent data collapse with alpha=12 and beta=1 . The effects of varying filling fraction and driving force are discussed.
authors.affiliation: Center for Stochastic Processes in Science and Engineering, Department of Physics, Virginia Tech, Blacksburg, VA 24061-0435, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Adams
authors.forename: B
authors.initials: B
authors.lastname: Schmittmann
authors.forename: R K P
authors.initials: RK
authors.lastname: Zia