Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session GO05: MFE: Analytical and Computational Techniques
9:30 AM–12:30 PM,
Tuesday, October 18, 2022
Room: Ballroom 111 B
Chair: Mark Cianciosa, Oak Ridge National Lab
Abstract: GO05.00014 : Plasma-wave interaction modelling in magnetic confined devices with the finite element method
12:06 PM–12:18 PM
Presenter:
Ruben Otin
(UK Atomic Energy Authority)
Authors:
Ruben Otin
(UK Atomic Energy Authority)
Guillaume Urbanczyk
(Institute of Plasma Physics CAS)
Wouter Tierens
(Max-Planck-Institut fr Plasmaphysik)
The numerical modelling of the plasma-wave interaction in the tenuous plasma close to the tokamak walls is especially challenging due to the confluence of vast physical phenomena with complex geometries. The Finite Element Method (FEM) seems a good choice to solve the problem. But the presence of phenomena as the Lower-Hybrid Resonance (LHR) or the parasitic excitation of small wavelengths modes crates serious numerical difficulties [2,3].
This work compares different FEM approaches implemented in the open-source code ERMES [4]. Some are new, as the Local L2 projections method with bubble elements or the regularized formulation, and others are more known as the edge elements formulation with and without Lagrange multipliers stabilization. The aim is to assess their computational performance and accuracy, and which one is the most adequate in realistic situations.
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