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Title: Influence of disorder strength on phase-field models of interfacial growth
Author: Laurila, Tomi
Pradas Gené, Marc
Hernández Machado, Aurora
Ala-Nissilä, Tapio
Keywords: Dinàmica de fluids
Mecànica dels medis continus
Fluid dynamics
Continuum mechanics
Issue Date: 2008
Publisher: The American Physical Society
Abstract: We study the influence of disorder strength on the interface roughening process in a phase-field model with locally conserved dynamics. We consider two cases where the mobility coefficient multiplying the locally conserved current is either constant throughout the system (the two-sided model) or becomes zero in the phase into which the interface advances (one-sided model). In the limit of weak disorder, both models are completely equivalent and can reproduce the physical process of a fluid diffusively invading a porous media, where super-rough scaling of the interface fluctuations occurs. On the other hand, increasing disorder causes the scaling properties to change to intrinsic anomalous scaling. In the limit of strong disorder this behavior prevails for the one-sided model, whereas for the two-sided case, nucleation of domains in front of the invading front are observed.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2008, vol. 78, p. 031603-1-031603-7
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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