A study of the transition to a turbulent shock using a coarse-graining approach to ion phase space transport
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866917866272456704 |
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| author | Trotta, D. Valentini, F. Burgess, D. Servidio, S. |
| author_facet | Trotta, D. Valentini, F. Burgess, D. Servidio, S. |
| contents | Shocks and turbulence are ubiquitous phenomena, responsible for particle acceleration to very high energies in a large collection of astrophysical systems. Using self-consistent, hybrid-kinetic simulations with and without pre-existing turbulence, we study the transition of a shock from ``laminar'' to turbulent. We show that the changes in upstream proton transport behaviour are crucial to understand this transition, which we address quantitatively with a novel Eulerian approach. This method, based on the coarse-graining of the Vlasov equation originally introduced in one of our previous studies, gives consistent results for inertial range scales. The potential applications of the coarse-graining approach beyond the shock-turbulence system are outlined. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08404 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A study of the transition to a turbulent shock using a coarse-graining approach to ion phase space transport Trotta, D. Valentini, F. Burgess, D. Servidio, S. Space Physics Shocks and turbulence are ubiquitous phenomena, responsible for particle acceleration to very high energies in a large collection of astrophysical systems. Using self-consistent, hybrid-kinetic simulations with and without pre-existing turbulence, we study the transition of a shock from ``laminar'' to turbulent. We show that the changes in upstream proton transport behaviour are crucial to understand this transition, which we address quantitatively with a novel Eulerian approach. This method, based on the coarse-graining of the Vlasov equation originally introduced in one of our previous studies, gives consistent results for inertial range scales. The potential applications of the coarse-graining approach beyond the shock-turbulence system are outlined. |
| title | A study of the transition to a turbulent shock using a coarse-graining approach to ion phase space transport |
| topic | Space Physics |
| url | https://arxiv.org/abs/2412.08404 |