72 citations · 370 across the 16 of their papers we have counts for
16 papers
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…
Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case
D. S. Oliveira, T. Body, D. Galassi +27
Self-consistent full-size turbulent-transport simulations of the divertor and SOL of existing tokamaks have recently become feasible. This enables the direct comparison of turbulen…
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…
Reproducibility, accuracy and performance of the Feltor code and library on parallel computer architectures
Matthias Wiesenberger, Lukas Einkemmer, Markus Held +3
Feltor is a modular and free scientific software package. It allows developing platform independent code that runs on a variety of parallel computer architectures ranging from lapt…
Streamline integration as a method for structured grid generation in X-point geometry
M. Wiesenberger, M. Held, L. Einkemmer +1
We investigate structured grids aligned to the contours of a two-dimensional flux-function with an X-point (saddle point). Our theoretical analysis finds that orthogonal grids exis…
Unified transport scaling laws for plasma blobs and depletions
Matthias Wiesenberger, Markus Held, Ralph Kube +1
We study the dynamics of seeded plasma blobs and depletions in an (effective) gravitational field. For incompressible flows the radial center of mass velocity of blobs and depletio…
Interchange instability and transport in matter-antimatter plasmas
Alexander Kendl, Gregor Danler, Matthias Wiesenberger +1
Symmetric electron-positron plasmas in inhomogeneous magnetic fields are intrinsically subject to interchange instability and transport. Scaling relations for the propagation veloc…
Streamline integration as a method for two-dimensional elliptic grid generation
Matthias Wiesenberger, Markus Held, Lukas Einkemmer
We propose a new numerical algorithm to construct a structured numerical elliptic grid of a doubly connected domain. Our method is applicable to domains with boundaries defined by…
The influence of temperature dynamics and dynamic finite ion Larmor radius effects on seeded high amplitude plasma blobs
M. Held, M. Wiesenberger, J. Madsen +1
Thermal effects on the perpendicular convection of seeded pressure blobs in the scrape-off layer of magnetised fusion plasmas are investigated. Our numerical study is based on a fo…
Three discontinuous Galerkin schemes for the anisotropic heat conduction equation on non-aligned grids
Markus Held, Matthias Wiesenberger, Andreas Stegmeir
We present and discuss three discontinuous Galerkin (dG) discretizations for the anisotropic heat conduction equation on non-aligned cylindrical grids. Our most favourable scheme r…
Radial convection of finite ion temperature, high amplitude plasma blobs
M. Wiesenberger, J. Madsen, A. Kendl
We present results from simulations of seeded blob convection in the scrape-off-layer of magnetically confined fusion plasmas. We consistently incorporate high fluctuation amplitud…
A conservative discontinuous Galerkin scheme for the 2D incompressible Navier--Stokes equations
Lukas Einkemmer, Matthias Wiesenberger
In this paper we consider a conservative discretization of the two-dimensional incompressible Navier--Stokes equations. We propose an extension of Arakawa's classical finite differ…