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Paper   IPM / Physic / 9599
School of Physics
  Title:   Scaling and Multiscaling Behavior of the Perimeter of Diffusion-Limited Aggregation (DLA) Generated by the Hastings-Levitov Method
1.  F. Mohammadi
2.  A. A. Saberi
3.  S. Rouhani
  Status:   Published
  Journal: J. Physics: Condens. Matter
  Vol.:  21
  Year:  2009
  Pages:   375110
  Supported by:  IPM
In this paper, we analyze the scaling behavior of Diffusion Limited Aggregation (DLA) simulated by Hastings-Levitov method. We obtain the fractal dimension of the clusters by direct analysis of the geometrical patterns in a good agreement with one obtained from analytical approach. We compute the two-point density correlation function and we show that in the large-size limit, it agrees with the obtained fractal dimension. These support the statistical agreement between the patterns and DLA clusters. We also investigate the scaling properties of various length scales and their fluctuations, related to the boundary of cluster. We find that all of the length scales do not have a simple scaling with same correction to scaling exponent. The fractal dimension of the perimeter is obtained equal to that of the cluster. The growth exponent is computed from the evolution of the interface width equal to β = 0.557(2). We also show that the perimeter of DLA cluster has an asymptotic multiscaling behavior.

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