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Effects of plasma resistivity in three-dimensional full-F gyro-fluid turbulence simulations
M. Wiesenberger, M. Held
A full-F, isothermal, electromagnetic, gyro-fluid model is used to simulate plasma turbulence in a COMPASS-sized, diverted tokamak. A parameter scan covering three orders of magnit…
Angular momentum and rotational energy of meanflows in toroidal magnetic fields
Matthias Wiesenberger, Markus Held
We derive the balance equation for the Favre averaged angular momentum in toroidal not necessarily axisymmetric magnetic field equilibria. We find that the components of angular mo…
Padé-based arbitrary wavelength polarization closures for full-F gyro-kinetic and -fluid models
Markus Held, Matthias Wiesenberger, Alexander Kendl
We propose a solution to the long-standing short wavelength polarization closure shortfall of full-F gyro-fluid models. This is achieved by first finding an appropriate quadratic f…
The collisional drift wave instability in steep density gradient regimes
Markus Held, Matthias Wiesenberger, Alexander Kendl
The collisional drift wave instability in a straight magnetic field configuration is studied within a full-F gyro-fluid model, which relaxes the Oberbeck-Boussinesq (OB) approximat…
Consistency in Drift-ordered Fluid Equations
Jakob Gath, Matthias Wiesenberger
We address several concerns related to the derivation of drift-ordered fluid equations. Starting from a fully Galilean invariant fluid system, we show how consistent sets of pertur…
Non-Oberbeck-Boussinesq zonal flow generation
Markus Held, Matthias Wiesenberger, Ralph Kube +1
Novel mechanisms for zonal flow (ZF) generation for both large relative density fluctuations and background density gradients are presented. In this non-Oberbeck-Boussinesq (NOB) r…