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Indiana University Mathematics Journal 60, 3 (2011) 895-936
Viscosity solutions for a polymer crystal growth model
Pierre Cardaliaguet 1, Olivier Ley 2, Aurélien Monteillet 1
(2011)

We prove existence of a solution for a polymer crystal growth model describing the movement of a front $(\Gamma(t))$ evolving with a nonlocal velocity. In this model the nonlocal velocity is linked to the solution of a heat equation with source $\delta_\Gamma$. The proof relies on new regularity results for the eikonal equation, in which the velocity is positive but merely measurable in time and with H\"{o}lder bounds in space. From this result, we deduce \textit{a priori} regularity for the front. On the other hand, under this regularity assumption, we prove bounds and regularity estimates for the solution of the heat equation.
1 :  Laboratoire de mathématiques de Brest (LM)
CNRS : UMR6205 – Université de Bretagne Occidentale [UBO] – Institut Supérieur des Sciences et Technologies de Brest (ISSTB)
2 :  Institut de Recherche Mathématique de Rennes (IRMAR)
CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne
Analyse numérique
Mathématiques/Equations aux dérivées partielles
Nonlocal Hamilton-Jacobi Equations – nonlocal front propagation – level-set approach – geometrical properties – lower-bound gradient estimate – viscosity solutions – eikonal equation – heat equation.
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