210 citations · 1.3k across the 48 of their papers we have counts for
14 papers · 1 filter
Variational Formulation of a Hybrid Kinetic and Gyrokinetic Model for Astrophysical and Laboratory Plasmas
F. N. deOliveira-Lopes, S. C. Thatikonda, D. Told +5
We present a Lagrangian model that encapsulates fully kinetic ions and gyrokinetic electrons for solar wind electromagnetic turbulence. Using a consistent method, where both electr…
Geometrical Formulation of Hybrid Kinetic and Gyrokinetic Hamiltonian Field Theory for Astrophysical and Laboratory Plasmas
Felipe Nathan deOliveira-Lopes, Daniel Told, Karen Pommois +3
In the present work, a consistent Lagrangian model that encapsulates fully kinetic ions and gyrokinetic electrons for solar wind electromagnetic turbulence is formulated. Using a c…
A Parallel Low-Rank Solver for the Six-Dimensional Vlasov-Maxwell Equations
Florian Allmann-Rahn, Rainer Grauer, Katharina Kormann
Continuum Vlasov simulations can be utilized for highly accurate modelling of fully kinetic plasmas. Great progress has been made recently regarding the applicability of the method…
Fluid Simulations of Three-Dimensional Reconnection that Capture the Lower-Hybrid Drift Instability
F. Allmann-Rahn, S. Lautenbach, R. Grauer +1
Fluid models that approximate kinetic effects have received attention recently in the modelling of large scale plasmas such as planetary magnetospheres. In three-dimensional reconn…
Multiphysics simulations of collisionless plasmas
Simon Lautenbach, Rainer Grauer
Collisionless plasmas, mostly present in astrophysical and space environments, often require a kinetic treatment as given by the Vlasov equation. Unfortunately, the six-dimensional…
Temperature gradient driven heat flux closure in fluid simulations of collisionless reconnection
Florian Allmann-Rahn, Thomas Trost, Rainer Grauer
Recent efforts to include kinetic effects in fluid simulations of plasmas have been very promising. Concerning collisionless magnetic reconnection, it has been found before that da…
Enhanced conservation properties of Vlasov codes through coupling with conservative fluid models
T. Trost, S. Lautenbach, R. Grauer
Many phenomena in collisionless plasma physics require a kinetic description. The evolution of the phase space density can be modeled by means of the Vlasov equation, which has to…
Coupled Vlasov and two-fluid codes on GPUs
M. Rieke, T. Trost, R. Grauer
We present a way to combine Vlasov and two-fluid codes for the simulation of a collisionless plasma in large domains while keeping full information of the velocity distribution in…
Numerical Simulation of Current Sheet Formation in a Quasi-Separatrix Layer using Adaptive Mesh Refinement
Frederic Effenberger, Kay Thust, Lukas Arnold +2
The formation of a thin current sheet in a magnetic quasi-separatrix layer (QSL) is investigated by means of numerical simulation using a simplified ideal, low-, MHD model. The…
A Lagrangian model for the evolution of turbulent magnetic and passive scalar fields
T. Hater, H. Homann, R. Grauer
In this paper we present an extension of the \emph{Recent Fluid Deformation (RFD)} closure introduced by Chevillard and Meneveau (2006) which was developed for modeling the time ev…
Three-dimensional MHD simulation of expanding magnetic flux ropes
L. Arnold, J. Dreher, R. Grauer +2
Three-dimensional, time-dependent numerical simulations of the dynamics of magnetic flux ropes are presented. The simulations are targeted towards an experiment previously conducte…
Lagrangian Statistics of Navier-Stokes- and MHD-Turbulence
H. Homann, R. Grauer, A. Busse +1
We report on a comparison of high-resolution numerical simulations of Lagrangian particles advected by incompressible turbulent hydro- and magnetohydrodynamic (MHD) flows. Numerica…
Vlasov simulations of collisionless magnetic reconnection without background density
H. Schmitz, R. Grauer
A standard starting point for the simulation of collisionless reconnection is the Harris equilibrium which is made up of a current sheet that separates two regions of opposing magn…
Kinetic Vlasov Simulations of collisionless magnetic Reconnection
H. Schmitz, R. Grauer
A fully kinetic Vlasov simulation of the Geospace Environment Modeling (GEM) Magnetic Reconnection Challenge is presented. Good agreement is found with previous kinetic simulations…