What is it about?
SPECYL and PIXIE3D are numerical predictive tools for magnetised plasmas relevant to nuclear fusion. We present the implementation of their new boundary modules, featuring a thin shell of input resistivity at plasma edge, separated from an outer conductor by an arbitrarily wide vacuum region, and including a fully consistent 3D fluid boundary. A thorough verification work is illustrated to ensure full mathematical accuracy of both implementations.
Photo by Михаил Секацкий on Unsplash
Why is it important?
Verifications studies are widely recognised as a fundamental preliminary test for any predictive numerical tool. The one we present here is extremely thorough and complete, and a specific effort was made to allow full replicability. The fully consistent forulation with 3D flow velocity is innovative with respect to most magneto-hydrodynamic codes and is here derived from first principles, for the first time in a comprehensive verification study. The level of achieved consistency allows challenging proof-of-principle tests, as the study of an external kink instability at the analytical boundary of simulations.
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This page is a summary of: Nonlinear verification of the resistive-wall boundary modules in the specyl and pixie3d magneto-hydrodynamic codes for fusion plasmas, AIP Advances, September 2023, American Institute of Physics, DOI: 10.1063/5.0161029.
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