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3D Fluid Simulations of Turbulence in Detached Scrape‐off‐Layer Plasmas
Author(s) -
Xu X. Q.,
Cohen R. H.
Publication year - 1996
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150360220
Subject(s) - turbulence , physics , plasma , curvature , mode (computer interface) , mechanics , nonlinear system , magnetic field , shear (geology) , classical mechanics , materials science , geometry , quantum mechanics , mathematics , computer science , composite material , operating system
In this paper, we present 3D simulations of scrape‐off‐layer (SOL) turbulence in detached plasmas. The nonlinear evolution of edge turbulence in the electrostatic limit is described by a four‐field model of the reduced Braginskii equations in a model x‐point geometry, including drives for the (1) conducting‐wall mode, (2) Kelvin‐Holmhotz mode, (3) curvature‐driven mode, (4) ▽ x v∥‐driven mode, and (5) axial shear mode. In a detached plasma with T e0 / T ed = 50 and N e0 / N ed = 0.2, and without magnetic shear, we find that a conducting‐wall‐like mode is the dominant drive even if turbulence drive from the sheath is small.