3D Fluid Simulations of Turbulence in Detached Scrape-off-Layer Plasmas

✍ Scribed by X. Q. Xu; R. H. Cohen

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 330 KB
• Volume: 36
• Category: Article
• ISSN: 0005-8025
• DOI: 10.1002/ctpp.2150360220

✦ Synopsis

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) curvaturedriven mode, (4) V,q-driven mode, and (5) axial shear mode. In a detached plasma with TealTed = 50 and Nd/Ned = 0.2, and without magnetic shear, we find that a conductingwall-like mode is the dominant drive even if turbulence drive from the sheath is small.