Laplacian growth with separately controlled noise and anisotropy

Details Laplacian growth with separately controlled noise and anisotropy Laplacian growth with separately controlled noise and anisotropy

2000-05-25

arxiv.org/abs/cond-mat/0005456v2

Phys. Rev. E 63, 061102 (2001)

Physics

Condensed Matter

Statistical Mechanics

13 pages, 15 figures

Scientific paper

10.1103/PhysRevE.63.061102

Conformal mapping models are used to study competition of noise and anisotropy in Laplacian growth. For that, a new family of models is introduced with the noise level and directional anisotropy controlled independently. Fractalization is observed in both anisotropic growth and the growth with varying noise. Fractal dimension is determined from cluster size scaling with its area. For isotropic growth we find d = 1.7, both at high and low noise. For anisotropic growth with reduced noise the dimension can be as low as d = 1.5 and apparently is not universal. Also, we study fluctuations of particle areas and observe, in agreement with previous studies, that exceptionally large particles may appear during the growth, leading to pathologically irregular clusters. This difficulty is circumvented by using an acceptance window for particle areas.

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