http://www.cnr.it/ontology/cnr/individuo/prodotto/ID293790
Global existence and uniqueness for a singular/degenerate Cahn-Hilliard system with viscosity (Articolo in rivista)
- Type
- Label
- Global existence and uniqueness for a singular/degenerate Cahn-Hilliard system with viscosity (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.jde.2013.02.014 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Pierluigi Colli; Gianni Gilardi; Paolo Podio-Guidugli; Jürgen Sprekels (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.sciencedirect.com/science/article/pii/S0022039613000909# (literal)
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- Dipartimento di Matematica \"F. Casorati\", Università di Pavia, via Ferrata 1, 27100 Pavia, Italy;
Dipartimento di Ingegneria Civile, Università di Roma \"Tor Vergata\", via del Politecnico 1, 00133 Roma, Italy;
WIAS - Weierstraß-Institut f¨ur Angewandte Analysis und Stochastik, Mohrenstraße 39, 10117 Berlin, Germany (literal)
- Titolo
- Global existence and uniqueness for a singular/degenerate Cahn-Hilliard system with viscosity (literal)
- Abstract
- Existence and uniqueness are investigated for a nonlinear diffusion problem of phase-field type, consisting of a parabolic system of two partial differential equations, complemented by Neumann homogeneous boundary conditions and initial conditions. This system aims to model two-species phase segregation on an atomic lattice (Podio-Guidugli, 2006 [19]); in the balance equations of microforces and microenergy, the two unknowns are the order parameter ? and the chemical potential ?. A simpler version of the same system has recently been discussed in Colli et al. (2011) [8]. In this paper, a fairly more general phase-field equation for ? is coupled with a genuinely nonlinear diffusion equation for ?. The existence of a global-in-time solution is proved with the help of suitable a priori estimates. In the case of a constant atom mobility, a new and rather unusual uniqueness proof is given, based on a suitable combination of variables. © 2013 Elsevier Inc. (literal)
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