Drift reduced Landau fluid model for magnetized plasma turbulence simulations in BOUT++ framework

TL;DR

This paper presents an upgraded drift-reduced Landau fluid model within the BOUT++ framework, enhancing tokamak edge turbulence simulations by including new normalization, flux-driven sources, Landau closure, and a Laplacian solver.

Contribution

The paper introduces a comprehensive upgrade to the Landau fluid turbulence model, enabling more accurate and versatile simulations of tokamak edge phenomena.

Findings

Extended model capabilities to simulate a wider range of tokamak edge phenomena

Inclusion of a Laplacian inversion solver for axisymmetric modes

Enhanced potential for self-consistent edge turbulence modeling

Abstract

Recently the drift-reduced Landau fluid six-field turbulence model within the BOUT++ framework has been upgraded. In particular, this new model employs a new normalization, adds a volumetric flux-driven source option, the Landau fluid closure for parallel heat flux and a Laplacian inversion solver which is able to capture n=0 axisymmetric mode evolution in realistic tokamak configurations. These improvements substantially extended model's capability to study a wider range of tokamak edge phenomena, and are essential to build a fully self-consistent edge turbulence model capable of both transient (e.g., ELM, disruption) and transport time-scale simulations.