Uniqueness and existence of spirals moving by forced mean curvature motion
Monneau, Régis; Imbert, Cyril; Forcadel, Nicolas (2012), Uniqueness and existence of spirals moving by forced mean curvature motion, Interfaces and Free Boundaries, 14, 3, p. 365-400. http://dx.doi.org/10.4171/IFB/285
Type
Article accepté pour publication ou publiéExternal document link
http://arxiv.org/abs/1002.0326v3Date
2012Journal name
Interfaces and Free BoundariesVolume
14Number
3Publisher
European Mathematical Society
Pages
365-400
Publication identifier
Metadata
Show full item recordAbstract (EN)
In this paper, we study the motion of spirals by mean curvature type motion in the (two dimensional) plane. Our motivation comes from dislocation dynamics; in this context, spirals appear when a screw dislocation line reaches the surface of a crystal. The first main result of this paper is a comparison principle for the corresponding parabolic quasi-linear equation. As far as motion of spirals are concerned, the novelty and originality of our setting and results come from the fact that, first, the singularity generated by the attached end point of spirals is taken into account for the first time, and second, spirals are studied in the whole space. Our second main result states that the Cauchy problem is well-posed in the class of sub-linear weak (viscosity) solutions. We also explain how to get the existence of smooth solutions when initial data satisfy an additional compatibility condition.Subjects / Keywords
mean curvature motion; viscosity solutions; quasi-linear parabolic equation; comparison principle; motion of interfaces; spiralsRelated items
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