Hermes: global plasma edge fluid turbulence simulations

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The transport of heat and particles in the relatively collisional
edge regions of magnetically confined plasmas is a scientifically challenging and
technologically important problem. Understanding and predicting this transport
requires the self-consistent evolution of plasma fluctuations, global profiles and flows, but the numerical tools capable of doing this in realistic (diverted) geometry are only now being developed. Here a 5-field reduced 2-fluid plasma model for the study of instabilities and turbulence in magnetised plasmas is presented, built on the BOUT++ framework. This cold ion model allows the evolution of global profiles, electric fields and flows on transport timescales, with flux-driven cross-field transport determined self-consistently by electromagnetic turbulence. Developments in the model formulation and numerical implementation are described, and simulations are performed in poloidally limited and diverted tokamak configurations.
Original languageEnglish
Article number054010
Number of pages12
JournalPlasma Physics and Controlled Fusion
Issue number5
Early online date1 Mar 2017
Publication statusPublished - 4 Apr 2017
EventJoint Varenna-Lausanne International Workshop on Theory of Fusion Plasmas - , United Kingdom
Duration: 29 Aug 20163 Sept 2016

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  • numerical methods
  • plasma turbulence
  • tokamak edge

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