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Updated: Jul 15, 2026

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
Published on: April 8, 2020
Coarsening of "clouds" and dynamic scaling in a far-from-equilibrium model system
D A Adams1, B Schmittmann, R K P Zia
1Center for Stochastic Processes in Science and Engineering, Department of Physics, Virginia Tech, Blacksburg, VA 24061-0435, USA.
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.
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