Activity statistics, avalanche kinetics, and velocity correlations in surface growth

Details Activity statistics, avalanche kinetics, and velocity correlations in surface growth Activity statistics, avalanche kinetics, and velocity correlations in surface growth

2010-06-21

arxiv.org/abs/1006.4023v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 3 eps figures

Scientific paper

We investigate the complex spatio-temporal dynamics in avalanche driven surface growth by means of scaling theory. We study local activity statistics, avalanche kinetics, and temporal correlations in the global interface velocity, obtaining different scaling relationships among the involved critical exponents depending on how far from or close to a critical point the system is. Our scaling arguments are very general and connect local and global magnitudes through several scaling relationships. We expect our results to be applicable in a wide range of systems exhibiting interface kinetic roughening driven by avalanches of local activity, either critical or not. As an example we apply the scaling theory to analyze avalanches and roughening of forced-flow imbibition fronts in excellent agreement with phase-field numerical simulations.

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