1. The GBS code for tokamak scrape-off layer simulations
- Author
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J. Morales, Trach-Minh Tran, Sébastien Jolliet, Fabio Riva, Félix Musil, Annamaria Mosetto, Federico David Halpern, Paolo Ricci, Christoph Wersal, and Joaquim Loizu
- Subjects
Physics ,Numerical Analysis ,Tokamak ,Physics and Astronomy (miscellaneous) ,Energetic neutral atom ,Turbulence ,Field line ,Applied Mathematics ,CRPP_EDGE ,Plasma ,Polarization (waves) ,01 natural sciences ,010305 fluids & plasmas ,Computer Science Applications ,law.invention ,Computational physics ,Computational Mathematics ,Physics::Plasma Physics ,law ,Modeling and Simulation ,0103 physical sciences ,Scalability ,Cartesian coordinate system ,Statistical physics ,010306 general physics - Abstract
We describe a new version of GBS, a 3D global, flux-driven plasma turbulence code to simulate the turbulent dynamics in the tokamak scrape-off layer (SOL), superseding the code presented by Ricci et al. (2012) [14]. The present work is driven by the objective of studying SOL turbulent dynamics in medium size tokamaks and beyond with a high-fidelity physics model. We emphasize an intertwining framework of improved physics models and the computational improvements that allow them. The model extensions include neutral atom physics, finite ion temperature, the addition of a closed field line region, and a non-Boussinesq treatment of the polarization drift. GBS has been completely refactored with the introduction of a 3-D Cartesian communicator and a scalable parallel multigrid solver. We report dramatically enhanced parallel scalability, with the possibility of treating electromagnetic fluctuations very efficiently. The method of manufactured solutions as a verification process has been carried out for this new code version, demonstrating the correct implementation of the physical model. (C) 2016 Published by Elsevier Inc.
- Published
- 2016
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