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Journal of Evolution Equations

, Volume 9, Issue 2, pp 371–404 | Cite as

On the 3D Cahn–Hilliard equation with inertial term

  • Maurizio GrasselliEmail author
  • Giulio Schimperna
  • Antonio Segatti
  • Sergey Zelik
Article

Abstract

We study the modified Cahn–Hilliard equation proposed by Galenko et al. in order to account for rapid spinodal decomposition in certain glasses. This equation contains, as additional term, the second-order time derivative of the (relative) concentration multiplied by a (small) positive coefficient \({\varepsilon}\) . Thus, in absence of viscosity effects, we are in presence of a Petrovsky type equation and the solutions do not regularize in finite time. Many results are known in one spatial dimension. However, even in two spatial dimensions, the problem of finding a unique solution satisfying given initial and boundary conditions is far from being trivial. A fairly complete analysis of the 2D case has been recently carried out by Grasselli, Schimperna and Zelik. The 3D case is still rather poorly understood but for the existence of energy bounded solutions. Taking advantage of this fact, Segatti has investigated the asymptotic behavior of a generalized dynamical system which can be associated with the equation. Here we take a step further by establishing the existence and uniqueness of a global weak solution, provided that \({\varepsilon}\) is small enough. More precisely, we show that there exists \({\varepsilon_0 > 0}\) such that well-posedness holds if (suitable) norms of the initial data are bounded by a positive function of \({\varepsilon\in (0,\varepsilon_0)}\) which goes to + ∞ as \({\varepsilon}\) tends to 0. This result allows us to construct a semigroup \({S_\varepsilon(t)}\) on an appropriate (bounded) phase space and, besides, to prove the existence of a global attractor. Finally, we show a regularity result for the attractor by using a decomposition method and we discuss the existence of an exponential attractor.

Mathematics Subject Classification (2000)

35B40 35B41 82C26 

Keywords

Cahn–Hilliard equation Weak solutions Global existence Global attractors Exponential attractors 

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Copyright information

© Birkhäuser Verlag Basel/Switzerland 2009

Authors and Affiliations

  • Maurizio Grasselli
    • 1
    Email author
  • Giulio Schimperna
    • 2
  • Antonio Segatti
    • 2
  • Sergey Zelik
    • 3
  1. 1.Dipartimento di MatematicaPolitecnico di MilanoMilanItaly
  2. 2.Dipartimento di MatematicaUniversità di PaviaPaviaItaly
  3. 3.Department of MathematicsUniversity of SurreyGuildfordUK

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