Optimal error estimates of the diffuse domain method for parabolic equations
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911189818146816 |
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| author | Hao, Wenrui Ju, Lili Xu, Yuejin |
| author_facet | Hao, Wenrui Ju, Lili Xu, Yuejin |
| contents | In this paper, we study the convergence behavior of the diffuse domain method (DDM) for solving a class of second-order parabolic partial differential equations with Neumann boundary condition posed on general irregular domains. The DDM employs a phase-field function to extend the original parabolic problem to a similar but slightly modified problem defined over a larger rectangular domain that contains the target physical domain. Based on the weighted Sobolev spaces, we rigorously establish the convergence of the diffuse domain solution to the original solution as the interface thickness parameter goes to zero, together with the corresponding optimal error estimates under the weighted $L^2$ and $H^1$ norms. Numerical experiments are also presented to validate the theoretical results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02226 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimal error estimates of the diffuse domain method for parabolic equations Hao, Wenrui Ju, Lili Xu, Yuejin Numerical Analysis In this paper, we study the convergence behavior of the diffuse domain method (DDM) for solving a class of second-order parabolic partial differential equations with Neumann boundary condition posed on general irregular domains. The DDM employs a phase-field function to extend the original parabolic problem to a similar but slightly modified problem defined over a larger rectangular domain that contains the target physical domain. Based on the weighted Sobolev spaces, we rigorously establish the convergence of the diffuse domain solution to the original solution as the interface thickness parameter goes to zero, together with the corresponding optimal error estimates under the weighted $L^2$ and $H^1$ norms. Numerical experiments are also presented to validate the theoretical results. |
| title | Optimal error estimates of the diffuse domain method for parabolic equations |
| topic | Numerical Analysis |
| url | https://arxiv.org/abs/2504.02226 |