An optimization-based construction procedure for function space based summation-by-parts operators on arbitrary grids
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866914796177195008 |
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| author | Glaubitz, Jan Nordström, Jan Öffner, Philipp |
| author_facet | Glaubitz, Jan Nordström, Jan Öffner, Philipp |
| contents | We introduce a novel construction procedure for one-dimensional summation-by-parts (SBP) operators. Existing construction procedures for FSBP operators of the form $D = P^{-1} Q$ proceed as follows: Given a boundary operator $B$, the norm matrix $P$ is first determined and then in a second step the complementary matrix $Q$ is calculated to finally get the FSBP operator $D$. In contrast, the approach proposed here determines the norm and complementary matrices, $P$ and $Q$, simultaneously by solving an optimization problem. The proposed construction procedure applies to classical SBP operators based on polynomial approximation and the broader class of function space SBP (FSBP) operators. According to our experiments, the presented approach yields a numerically stable construction procedure and FSBP operators with higher accuracy for diagonal norm difference operators at the boundaries than the traditional approach. Through numerical simulations, we highlight the advantages of our proposed technique. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_08770 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An optimization-based construction procedure for function space based summation-by-parts operators on arbitrary grids Glaubitz, Jan Nordström, Jan Öffner, Philipp Numerical Analysis Optimization and Control 65M12, 65M60, 65M70, 65D25 We introduce a novel construction procedure for one-dimensional summation-by-parts (SBP) operators. Existing construction procedures for FSBP operators of the form $D = P^{-1} Q$ proceed as follows: Given a boundary operator $B$, the norm matrix $P$ is first determined and then in a second step the complementary matrix $Q$ is calculated to finally get the FSBP operator $D$. In contrast, the approach proposed here determines the norm and complementary matrices, $P$ and $Q$, simultaneously by solving an optimization problem. The proposed construction procedure applies to classical SBP operators based on polynomial approximation and the broader class of function space SBP (FSBP) operators. According to our experiments, the presented approach yields a numerically stable construction procedure and FSBP operators with higher accuracy for diagonal norm difference operators at the boundaries than the traditional approach. Through numerical simulations, we highlight the advantages of our proposed technique. |
| title | An optimization-based construction procedure for function space based summation-by-parts operators on arbitrary grids |
| topic | Numerical Analysis Optimization and Control 65M12, 65M60, 65M70, 65D25 |
| url | https://arxiv.org/abs/2405.08770 |