Speaker
Description
Particle drifts play a crucial role in understanding of the edge physics of current and future fusion
devices. While tokamak simulations routinely include drift effects, they have been largely neglected
in stellarator simulations until now. Advancements in BOUT++ enable the efficient simulation
of stellarator geometries. Hermes-3 is a plasma fluid model for the edge of fusion devices and
covers a wide range of levels of fidelity. In this work, we report on the progress of the Hermes3 implementation for non-axisymmetric geometries using the flux-coordinates-independent (FCI)
approach. We elucidate the implementation for steady-state transport simulations with drifts and
show a first example simulation of W7-X. Additionally, we demonstrate the turbulence capabilities
by simulating a W7-AS-like stellarator geometry. In addition to recent progress, we show some of
the remaining challenges such as neutral physics or the creation of closed divertor grids.