Diffusion-limited aggregation with surface tension

R. Tao, M. A. Novotny, Kimmo Kaski

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

39 Sitaatiot (Scopus)

Abstrakti

Computer simulations of diffusion-limited aggregation (DLA) show that surface tension, as a short-range interaction, does not change the fractal structure for large aggregates. Clusters grown with surface tension develop three regions. (1) At the center, the cluster is compact and regular; the effective fractal dimension Defff is close to 2. (2) Next to the center is a transition region where Defff decreases quickly from 2 to about 1.70±0.05. (3) Past the transition region, the cluster grows as a DLA fractal and Defff extrapolates to 1.70±0.05. An increased surface tension is found to produce clusters with rounder shapes, thicker fingers, and larger compact centers. The thickness of the fingers and the size of the compact center are determined theoretically, and these estimations compare well with results obtained from the numerical simulations.
AlkuperäiskieliEnglanti
Sivut1019-1026
JulkaisuPhysical Review A
Vuosikerta38
Numero2
DOI - pysyväislinkit
TilaJulkaistu - 1988
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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