GREENY: A Full-F 2D Gyrofluid Reconnection Code

TL;DR

GREENY is a comprehensive 2D gyrofluid code designed to simulate magnetic reconnection, incorporating advanced models and numerical methods to accurately capture nonlinear electromagnetic phenomena in plasma physics.

Contribution

The paper introduces GREENY, a novel gyrofluid simulation code with extended electromagnetic nonlinearity, and demonstrates its capabilities through various tests and example reconnection simulations.

Findings

GREENY accurately models magnetic reconnection phenomena.

The code maintains conservation laws and handles quasi-neutrality effectively.

Artificial dissipation impacts reconnection dynamics in the simulations.

Abstract

We present the 2D gyrofluid magnetic reconnection code GREENY (Gyrofluid Reconnection with Extended Electromagnetic Nonlinearity). After a brief introduction to gyrofluids, magnetic reconnection, and the implemented models, we discuss the numerical framework and the algorithmic treatment of the quasi-neutrality condition and Amper\`e's law. Next, we present solver tests, conservation laws, and the influence of artificial subgrid dissipation on Harris-sheet magnetic reconnection. Finally, we show different applications, initial conditions and present example simulations.