Article,

Multiple invaded consolidating materials

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PHYSICAL REVIEW E, (2004)
DOI: 10.1103/PhysRevE.70.066150

Abstract

We study a multiple invasion model to simulate corrosion or intrusion processes. Estimated values for the fractal dimension of the invaded region reveal that the critical exponents vary as a function of the generation number G, i.e., with the number of times the invasion process takes place. The averaged mass M of the invaded region decreases with a power law as a function of G, Msimilar toG(beta), where the exponent betaapproximate to0.6. We also find that the fractal dimension of the invaded cluster changes from d(1)=1.887+/-0.002 to d(s)=1.217+/-0.005. This result confirms that the multiple invasion process (for the case in which uninvaded regions are forbidden) follows a continuous transition from one universality class (nontrapping invasion percolation) to another (optimal path). In addition, we report extensive numerical simulations that indicate that the mass distribution of avalanches P(S,L) has a power-law behavior and we find that the exponent tau governing the power-law P(S,L)similar toS(-tau) changes continuously as a function of the parameter G. We propose a scaling law for the mass distribution of avalanches for different number of generations G.

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