Smarrazzo, Flavia

Terracina, Andrea

English

We discuss some properties of a forward-backward parabolic problem that arises in models of phase transition in which two stable phases are separated by an interface. Here we consider a formulation of the problem that comes from a Sobolev approximation of it. In particular we prove uniqueness of the previous problem extending to nonlinear diffusion function a result obtained in [21] in the piecewise linear case. Moreover, we analyze the third order partial differential problem that approximates the forward-backward parabolic one. In particular, for some classes of initial data, we obtain a priori estimates that generalize that proved in [22]. Using these results we study the singular limit of the Sobolev approximation, as a consequence we obtain existence of the forward-backward problem for a class of initial data

Flavia Smarrazzo

TERRACINA, Andrea

Archivio della ricerca- Università di Roma La Sapienza

Sobolev approximation for two-phase solutions of forward-backward parabolic problems

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Sobolev approximation for two-phase solutions of forward-backward parabolic problems

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Archivio della ricerca- Università di Roma La Sapienza