Hannover 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
P: Fachverband Plasmaphysik
P 10: Poster Session 2
P 10.13: Poster
Dienstag, 10. März 2020, 16:30–18:30, Empore Lichthof
Simulating turbulence and profile evolution in the tokamak periphery with GRILLIX — •Wladimir Zholobenko, Thomas Body, Andreas Stegmeir, David Coster, and Frank Jenko — Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
To be economically viable, magnetic confinement nuclear fusion reactors must be big. This makes the construction of practice relevant experiments like ITER very costly, leaving little room for experimentation and none for failure. Therefore, theoretical understanding and predictive capability are vital. Most promising are first principle based plasma turbulence codes, such as GRILLIX.
GRILLIX’ main feature is the simulation of turbulent flows in complex, experimentally relevant magnetic geometry. The physical model1 - global drift-reduced Braginskii equations - has no splitting between background and fluctuations. This allows to not only simulate gradient driven turbulent transport, but also the profile evolution itself. The results depend only on magnetic geometry, plasma sources and initial conditions - yielding high predictive capability for the price of high computational expense.
The code and the physical model are yet under development, to increase performance, reliability and realism. However, first applications to today’s tokamaks like ASDEX Upgrade are able to reproduce important qualitative features, such as the self-consistent electric field and its impact on turbulence and profiles.
[1] W. Zholobenko et al., Thermal dynamics in the FCI turbulence code GRILLIX, 17th PET workshop, submitted to CtPP (2019).