Asymptotic behaviour of the heat equation in an exterior domain with general boundary conditions I. The case of integrable data
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913434397835264 |
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| author | Domínguez-de-Tena, Joaquín Rodríguez-Bernal, Aníbal |
| author_facet | Domínguez-de-Tena, Joaquín Rodríguez-Bernal, Aníbal |
| contents | In this work, we study the asymptotic behaviour of solutions to the heat equation in exterior domains, i.e., domains which are the complement of a smooth compact set in $\mathbb{R}^N$. Different homogeneous boundary conditions are considered, including Dirichlet, Robin, and Neumann conditions for integrable initial data in $L^1(Ω)$. After taking into account the loss of mass of the solution through the boundary, depending on the boundary conditions, we describe the asymptotic spatial distribution of the remaining mass in terms of the Gaussian and of a suitable asymptotic profile function. We show that our results have optimal time rates. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_12406 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Asymptotic behaviour of the heat equation in an exterior domain with general boundary conditions I. The case of integrable data Domínguez-de-Tena, Joaquín Rodríguez-Bernal, Aníbal Analysis of PDEs 35K05, 35B40, 35B30, 35E15 In this work, we study the asymptotic behaviour of solutions to the heat equation in exterior domains, i.e., domains which are the complement of a smooth compact set in $\mathbb{R}^N$. Different homogeneous boundary conditions are considered, including Dirichlet, Robin, and Neumann conditions for integrable initial data in $L^1(Ω)$. After taking into account the loss of mass of the solution through the boundary, depending on the boundary conditions, we describe the asymptotic spatial distribution of the remaining mass in terms of the Gaussian and of a suitable asymptotic profile function. We show that our results have optimal time rates. |
| title | Asymptotic behaviour of the heat equation in an exterior domain with general boundary conditions I. The case of integrable data |
| topic | Analysis of PDEs 35K05, 35B40, 35B30, 35E15 |
| url | https://arxiv.org/abs/2407.12406 |