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| Titel |
Hybrid-Vlasov simulation of plasma instabilities: first results from Vlasiator |
| VerfasserIn |
Dimitry Pokhotelov, Sebastian von Alfthan, Yann Kempf, Minna Palmroth |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078617
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| Zusammenfassung |
| The newly developed code called Vlasiator simulates the dynamics of plasma using the hybrid-Vlasov model, where plasma ions are described by a full six-dimensional distribution function in ordinary and velocity space and electrons are modelled as a charge-neutralizing fluid. The Vlasiator code solves kinetic Vlasov equation for ions and ideal MHD equations for electron fluid. The code is engineered to run in a massively parallel setup on modern supercomputers using hybrid MPI-OpenMP parallelisation. First results of modelling plasma instabilities using Vlasiator in magnetosheath-type plasma environment will be presented. Large-scale shear flow instabilities, such as Kelvin-Helmholtz instability, will be considered, as well as the medium-scale mirror mode instability resulting from large temperature anisotropy across the magnetic field in high-beta magnetosheath plasma. Also the firehose instability typically occurring in the solar wind plasma will be considered. It will be shown that the new hybrid-Vlasov code is able to reproduce known features of the key instabilities. |
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