On the regularity for thermoelastic systems of phase-lag parabolic type
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914185318760448 |
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| author | Rivera, Jaime Muñoz Ochoa, Elena Ochoa Quintanilla, Ramón |
| author_facet | Rivera, Jaime Muñoz Ochoa, Elena Ochoa Quintanilla, Ramón |
| contents | In this article, we investigate the maximal smoothness (infinite differentiability) of solutions to thermoelastic models, specifically those where the heat equation is of the ``phase-lag'' or ``parabolic'' type. We derive optimal regularity results for two distinct models. The first model addresses the transverse oscillations of a fully thermoelastic plate, for which we prove that the associated semigroup is analytic. The second model considers a partially thermoelastic plate composed of two components: a thermoelastic component with nonzero temperature differences and an elastic component unaffected by temperature variations. For this model, we demonstrate that the semigroup \( S(t) \) belongs to the Gevrey class of order 4, provided the solutions are radial and symmetric. Both analyticity and Gevrey class membership are qualitative properties that intricately link regularity and stability, driven by robust dissipative mechanisms. These properties are significantly stronger than standard regularity conditions, such as belonging to the class \( C^k \) or a Sobolev space \( H^s \). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_06634 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the regularity for thermoelastic systems of phase-lag parabolic type Rivera, Jaime Muñoz Ochoa, Elena Ochoa Quintanilla, Ramón Analysis of PDEs 35B40, Secondary 35B35, 74K20, 74F05 G.1.8 In this article, we investigate the maximal smoothness (infinite differentiability) of solutions to thermoelastic models, specifically those where the heat equation is of the ``phase-lag'' or ``parabolic'' type. We derive optimal regularity results for two distinct models. The first model addresses the transverse oscillations of a fully thermoelastic plate, for which we prove that the associated semigroup is analytic. The second model considers a partially thermoelastic plate composed of two components: a thermoelastic component with nonzero temperature differences and an elastic component unaffected by temperature variations. For this model, we demonstrate that the semigroup \( S(t) \) belongs to the Gevrey class of order 4, provided the solutions are radial and symmetric. Both analyticity and Gevrey class membership are qualitative properties that intricately link regularity and stability, driven by robust dissipative mechanisms. These properties are significantly stronger than standard regularity conditions, such as belonging to the class \( C^k \) or a Sobolev space \( H^s \). |
| title | On the regularity for thermoelastic systems of phase-lag parabolic type |
| topic | Analysis of PDEs 35B40, Secondary 35B35, 74K20, 74F05 G.1.8 |
| url | https://arxiv.org/abs/2512.06634 |