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Pinning of interfaces in a random medium with zero mean
ID Dondl, Patrick W. (Author), ID Jesenko, Martin (Author), ID Scheutzow, Michael (Author)

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Abstract
We consider two related models for the propagation of a curvature sensitive interface in a time independent random medium. In both cases we suppose that the medium contains obstacles that act on the propagation of the interface with an inhibitory or an acceleratory force. We show that the interface remains bounded for all times even when a small constant external driving force is applied. This phenomenon has already been known when only inhibitory obstacles are present. In this work we extend this result to the case of – for example – a random medium of random zero mean forcing. The first model we study is discrete with a random forcing on each lattice site. In this case we construct a supersolution employing a local path optimization procedure. In the second, continuous, model we consider a random heterogenous medium consisting of localized small obstacles of random sign. To construct a stationary supersolution here, we need to pass through sufficiently many blocking obstacles while avoiding any obstacles of the other sign. This is done by employing a custom percolation argument.

Language:English
Keywords:Quenched Edwards–Wilkinson model, phase boundaries, pinning, random environment, viscosity super-solutions
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2021
Number of pages:Str. 305-321
Numbering:Vol. 23, iss. 3
PID:20.500.12556/RUL-135491 This link opens in a new window
UDC:51
ISSN on article:1463-9963
DOI:10.4171/IFB/455 This link opens in a new window
COBISS.SI-ID:92464899 This link opens in a new window
Publication date in RUL:16.03.2022
Views:764
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Record is a part of a journal

Title:Interfaces and free boundaries
Shortened title:Interfaces free bound.
Publisher:Oxford University Press, EMS Publishing House
ISSN:1463-9963
COBISS.SI-ID:512083993 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:matematika, gradbeništvo, Edwards-Wilkinsonov model, meje faz, vkleščenost, slučajno okolje, super-rešitve v viskoznem smislu

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