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Article type: Research Article
Authors: Ekohela, Clesh Deseskel Elion; * | Bissanga, Gabriel | Batchi, Macaire
Affiliations: Faculté des Sciences et Techniques, Université Marien Ngouabi, BP: 69, Brazzaville, Congo
Correspondence: [*] Corresponding author. E-mail: [email protected].
Abstract: The aim of this article is to study asymptotic behavior of higher-order (in space) anisotropic perturbed Caginalp phase-field systems with relaxations hyperbolic in term of attractors. The main difficulty comes from the fact that the phase spaces for the perturbed (ϵ≠0) and unperturbed (ϵ=0) equations are not the same; indeed, the limit problem is parabolic. Therefore, the previous approach employing for parabolic systems, cannot be applied and have to be adapted. In particular, this necessitates a study of the time boundary layer in order to estimate the difference of solutions between the perturbed and unperturbed equations. Finally, we obtain the existence of the global attractor, as well as the existence of exponential attractors.
Keywords: Anisotropy, boundary layer, Caginalp system, dissipativity, exponential attractors, hyperbolic relaxation, higher-order systems, global attractor, perturbed damped wave equation
DOI: 10.3233/ASY-191540
Journal: Asymptotic Analysis, vol. 116, no. 3-4, pp. 149-217, 2020
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