Richard F. Voss, John Clarke
Journal of the Acoustical Society of America
Kinetic fractal aggregation in a particle bath where a fraction f of the sites are initially occupied is studied with d=2 computer simulations. Independent particles diffusing to a fixed cluster produce an aggregate with fractal dimension D≅ 1.7 up to a correlation length ξ(f). At larger lengths D→2. ξ(f) → ∞ as f → 0. When the particles remain fixed but the cluster undergoes a rigid random walk D appears constant at larger scales but varies with f. D → 1.95 at large f and D → 1.7 as f → 0. In both cases, the aggregate size N(t) grows with time tγ(f) . Aggregation on a surface by independently diffusing particles produces shapes reminiscent of electrochemical dendritic growth. The dependence of growth rate and geometry is studied as a function of particle concentration and sticking probability. © 1984 Plenum Publishing Corporation.
Richard F. Voss, John Clarke
Journal of the Acoustical Society of America
Richard F. Voss
Physical Review Letters
Richard F. Voss
Applied Physics Letters
Richard F. Voss
Journal of Low Temperature Physics