Dynamic Scaling in One-Dimensional Cluster-Cluster Aggregation

Details Dynamic Scaling in One-Dimensional Cluster-Cluster Aggregation Dynamic Scaling in One-Dimensional Cluster-Cluster Aggregation

2000-07-13

arxiv.org/abs/cond-mat/0007223v1

Phys. Rev. E 62, 4752 (2000).

Physics

Condensed Matter

Statistical Mechanics

6 pages, 6 figures, RevTeX, submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.62.4752

We study the dynamic scaling properties of an aggregation model in which particles obey both diffusive and driven ballistic dynamics. The diffusion constant and the velocity of a cluster of size $s$ follow $D(s) \sim s^\gamma$ and $v(s) \sim s^\delta$, respectively. We determine the dynamic exponent and the phase diagram for the asymptotic aggregation behavior in one dimension in the presence of mixed dynamics. The asymptotic dynamics is dominated by the process that has the largest dynamic exponent with a crossover that is located at $\delta = \gamma - 1$. The cluster size distributions scale similarly in all cases but the scaling function depends continuously on $\gamma$ and $\delta$. For the purely diffusive case the scaling function has a transition from exponential to algebraic behavior at small argument values as $\gamma$ changes sign whereas in the drift dominated case the scaling function decays always exponentially.

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