210 citations · 1.3k across the 48 of their papers we have counts for
8 papers · 1 filter
The muphyII Code: Multiphysics Plasma Simulation on Large HPC Systems
Florian Allmann-Rahn, Simon Lautenbach, Magnus Deisenhofer +1
Collsionless astrophysical and space plasmas cover regions that typically display a separation of scales that exceeds any code's capabilities. To help address this problem, the mup…
Instanton based importance sampling for rare events in stochastic PDEs
Lasse Ebener, Georgios Margazoglou, Jan Friedrich +2
We present a new method for sampling rare and large fluctuations in a non-equilibrium system governed by a stochastic partial differential equation (SPDE) with additive forcing. To…
A Hybrid Monte Carlo algorithm for sampling rare events in space-time histories of stochastic fields
G. Margazoglou, L. Biferale, R. Grauer +4
We introduce a variant of the Hybrid Monte Carlo (HMC) algorithm to address large-deviation statistics in stochastic hydrodynamics. Based on the path-integral approach to stochasti…
A semi-implicit Hall-MHD solver using whistler wave preconditioning
Lukas Arnold, Juergen Dreher, Rainer Grauer
The dispersive character of the Hall-MHD solutions, in particular the whistler waves, is a strong restriction to numerical treatments of this system. Numerical stability demands a…
Impact of the floating-point precision and interpolation scheme on the results of DNS of turbulence by pseudo-spectral codes
Holger Homann, Jürgen Dreher, Rainer Grauer
In this paper we investigate the impact of the floating-point precision and interpolation scheme on the results of direct numerical simulations (DNS) of turbulence by pseudo-spectr…
Comparison of time splitting and backsubstitution methods for integrating Vlasov's equation with magnetic fields
H. Schmitz, R. Grauer
The standard approach for integrating the multidimensional Vlasov equation using grid based, conservative schemes is based on a time splitting approach. Here, we show that although…