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arXiv · 1609.03360

Hermes: Global plasma edge fluid turbulence simulations

Ben Dudson·Jarrod Leddy
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Abstract

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.

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Ben Dudson, Jarrod Leddy. 2016-09-12. Hermes: Global plasma edge fluid turbulence simulations. https://doi.org/10.1088/1361-6587/aa63d2

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