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Title: The GBS code for tokamak scrape-off layer simulations

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.

Authors:
 [1]; ;  [1];  [2]; ; ; ; ; ;  [1]
  1. Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne (Switzerland)
  2. Max-Planck-Institut für Plasmaphysik, D-17491, Greifswald (Germany)
Publication Date:
OSTI Identifier:
22572318
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 315; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FLUCTUATIONS; ION TEMPERATURE; PLASMA; PLASMA SCRAPE-OFF LAYER; SIMULATION; TOKAMAK DEVICES; TURBULENCE

Citation Formats

Halpern, F.D., E-mail: federico.halpern@epfl.ch, Ricci, P., Jolliet, S., Loizu, J., Morales, J., Mosetto, A., Musil, F., Riva, F., Tran, T.M., and Wersal, C. The GBS code for tokamak scrape-off layer simulations. United States: N. p., 2016. Web. doi:10.1016/J.JCP.2016.03.040.
Halpern, F.D., E-mail: federico.halpern@epfl.ch, Ricci, P., Jolliet, S., Loizu, J., Morales, J., Mosetto, A., Musil, F., Riva, F., Tran, T.M., & Wersal, C. The GBS code for tokamak scrape-off layer simulations. United States. doi:10.1016/J.JCP.2016.03.040.
Halpern, F.D., E-mail: federico.halpern@epfl.ch, Ricci, P., Jolliet, S., Loizu, J., Morales, J., Mosetto, A., Musil, F., Riva, F., Tran, T.M., and Wersal, C. Wed . "The GBS code for tokamak scrape-off layer simulations". United States. doi:10.1016/J.JCP.2016.03.040.
@article{osti_22572318,
title = {The GBS code for tokamak scrape-off layer simulations},
author = {Halpern, F.D., E-mail: federico.halpern@epfl.ch and Ricci, P. and Jolliet, S. and Loizu, J. and Morales, J. and Mosetto, A. and Musil, F. and Riva, F. and Tran, T.M. and Wersal, C.},
abstractNote = {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.},
doi = {10.1016/J.JCP.2016.03.040},
journal = {Journal of Computational Physics},
number = ,
volume = 315,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}