Modeling plasma-wall interactions in First Wall-Limiter geometry

We test the standard edge plasma code B2-solps5.0 on a model First-Wall Limiter (FWL) geometry. The presence of a tangency point between the solid wall and the magnetic separatrix introduces a singular point in the geometry. A quadrilateral computational mesh can fit the given configuration only if it is highly distorted, constituting a severe test for any numerical scheme. The original 5-point molecule adopted by B2-solps5.0 fails to solve the plasma transport equations near the singular point. A correction scheme is proposed, which is equivalent to adopting a 9-point stencil. 2004 Elsevier B.V. All rights reserved.

• Type: Journal
• Year: 2004
• Where: CPHYSICS
• Authors: F. Subba, R. Zanino
• Keywords: CPHYSICS 2004, Model First-wall Limiter, Singular Point, Standard Edge Plasma