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Exponential decay in one‐dimensional Type II/III thermoelasticity with two porosities
Author(s) -
Magaña Antonio,
Quintanilla Ramón
Publication year - 2020
Publication title -
mathematical methods in the applied sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 65
eISSN - 1099-1476
pISSN - 0170-4214
DOI - 10.1002/mma.6438
Subject(s) - dissipation , viscoelasticity , mathematics , context (archaeology) , type (biology) , thermal conduction , mathematical analysis , exponential function , exponential decay , thermal , porous medium , porosity , physics , thermodynamics , materials science , composite material , paleontology , ecology , nuclear physics , biology
In this paper, we consider the theory of thermoelasticity with a double porosity structure in the context of the Green–Naghdi Types II and III heat conduction models. For the Type II, the problem is given by four hyperbolic equations, and it is conservative (there is no energy dissipation). We introduce in the system a couple of dissipation mechanisms in order to obtain the exponential decay of the solutions. To be precise, we introduce a pair of the following damping mechanisms: viscoelasticity, viscoporosities, and thermal dissipation. We prove that the system is exponentially stable in three different scenarios: viscoporosity in one structure jointly with thermal dissipation, viscoporosity in each structure, and viscoporosity in one structure jointly with viscoelasticity. However, if viscoelasticity and thermal dissipation are considered together, undamped solutions can be obtained