Title:
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Growth of unstable interfaces in disordered media
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Author:
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Lacasta Palacio, Ana María; Ramírez de la Piscina Millán, Laureano; Casademunt, Jaume; Hernández-Machado, Aurora; Rodríguez, M. A.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. NOLIN - Física No-Lineal i Sistemes Fora de l'Equilibri |
Abstract:
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The effects of a disordered medium in the growth of unstable interfaces are studied by means of two local
models with multiplicative and additive quenched disorder, respectively. For short times and large pushing the
multiplicative quenched disorder is equivalent to a time-dependent noise. In this regime, the linear dispersion
relation contains a destabilizing contribution introduced by the noise. For long times, the interface always gets
pinned. We model the systematics of the pinned shapes by means of an effective nonlinear model. These
results show good agreement with numerical simulations. For the additive noise we find numerically that a
depinning transition occurs. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Nonlinear systems -Nonlinear dynamics -Interfaces -Disorder -Morphological instability -Sistemes no lineals |
Rights:
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Document type:
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Article |
Published by:
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American Physical Society
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