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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2404.18549 |
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| _version_ | 1866916227834707968 |
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| author | Wilhelm, Rostislav-Paul Eifert, Jan Torrilhon, Manuel |
| author_facet | Wilhelm, Rostislav-Paul Eifert, Jan Torrilhon, Manuel |
| contents | The accurate prediction of occurrence and strength of kinetic instabilities in plasmas remains a significant challenge in nuclear fusion research. To accurately capture the plasmas dynamics one is required to solve the Vlasov equation for several species which, however, comes with a number of challenges as high dimensionality of the model as well as turbulence and development of fine but relevant structures in the distribution function. The predominantly employed Particle-in-Cell (PIC) method often lacks the accuracy to resolve the dynamics correctly, which can only be remedied by going to higher resolutions but at a prohibitorily high cost due to the high-dimensionality. Thus in this work we discuss the usage of the Numerical Flow Iteration (NuFI) as high fidelity approach, in contrast to e.g. PIC or grid-based approaches, to solve the multi-species Vlasov equation in modes leading to kinetic instabilities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18549 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High Fidelity simulations of the multi-species Vlasov equation in the electro-static, collisional-less limit Wilhelm, Rostislav-Paul Eifert, Jan Torrilhon, Manuel Plasma Physics The accurate prediction of occurrence and strength of kinetic instabilities in plasmas remains a significant challenge in nuclear fusion research. To accurately capture the plasmas dynamics one is required to solve the Vlasov equation for several species which, however, comes with a number of challenges as high dimensionality of the model as well as turbulence and development of fine but relevant structures in the distribution function. The predominantly employed Particle-in-Cell (PIC) method often lacks the accuracy to resolve the dynamics correctly, which can only be remedied by going to higher resolutions but at a prohibitorily high cost due to the high-dimensionality. Thus in this work we discuss the usage of the Numerical Flow Iteration (NuFI) as high fidelity approach, in contrast to e.g. PIC or grid-based approaches, to solve the multi-species Vlasov equation in modes leading to kinetic instabilities. |
| title | High Fidelity simulations of the multi-species Vlasov equation in the electro-static, collisional-less limit |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2404.18549 |