The muphyII Code: Multiphysics Plasma Simulation on Large HPC Systems
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866914646433202176 |
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| author | Allmann-Rahn, Florian Lautenbach, Simon Deisenhofer, Magnus Grauer, Rainer |
| author_facet | Allmann-Rahn, Florian Lautenbach, Simon Deisenhofer, Magnus Grauer, Rainer |
| contents | Collsionless astrophysical and space plasmas cover regions that typically display a separation of scales that exceeds any code's capabilities. To help address this problem, the muphyII code utilizes a hierarchy of models with different inherent scales, unified in an adaptive framework that allows stand-alone use of models as well as a model-based dynamic and adaptive domain decomposition. This requires ensuring excellent conservation properties, careful treatment of inner-domain model boundaries for model coupling, and robust time stepping algorithms, especially with the use of electron subcycling. This multi-physics approach is implemented in the muphyII code, tested on different scenarios of space plasma reconnection and evaluated against space probe data and higher-fidelity simulation results from literature. Adaptive model refinement is highlighted in particular, and a hybrid model with kinetic ions, pressure-tensor fluid electrons, and Maxwell fields is appraised. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_01487 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | The muphyII Code: Multiphysics Plasma Simulation on Large HPC Systems Allmann-Rahn, Florian Lautenbach, Simon Deisenhofer, Magnus Grauer, Rainer Computational Physics Plasma Physics Collsionless astrophysical and space plasmas cover regions that typically display a separation of scales that exceeds any code's capabilities. To help address this problem, the muphyII code utilizes a hierarchy of models with different inherent scales, unified in an adaptive framework that allows stand-alone use of models as well as a model-based dynamic and adaptive domain decomposition. This requires ensuring excellent conservation properties, careful treatment of inner-domain model boundaries for model coupling, and robust time stepping algorithms, especially with the use of electron subcycling. This multi-physics approach is implemented in the muphyII code, tested on different scenarios of space plasma reconnection and evaluated against space probe data and higher-fidelity simulation results from literature. Adaptive model refinement is highlighted in particular, and a hybrid model with kinetic ions, pressure-tensor fluid electrons, and Maxwell fields is appraised. |
| title | The muphyII Code: Multiphysics Plasma Simulation on Large HPC Systems |
| topic | Computational Physics Plasma Physics |
| url | https://arxiv.org/abs/2305.01487 |