Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Sonnendrücker, Éric"'
Autor:
Lu, Zhixin, Meng, Guo, Sonnendrücker, Eric, Hatzky, Roman, Mishchenko, Alexey, Zonca, Fulvio, Lauber, Philipp, Hoelzl, Matthias
This paper presents a novel approach for simulating plasma instabilities in tokamak plasmas using the piecewise field-aligned finite element method in combination with the particle-in-cell method. Our method traditionally aligns the computational gri
Externí odkaz:
http://arxiv.org/abs/2410.23981
Autor:
Lu, Zhixin, Meng, Guo, Hatzky, Roman, Sonnendrücker, Eric, Mishchenko, Alexey, Chen, Jin, Lauber, Philipp, Zonca, Fulvio, Hoelzl, Matthias
The triangular mesh-based gyrokinetic scheme enables comprehensive axis-to-edge studies across the entire plasma volume. Our approach employs triangular finite elements with first-derivative continuity (C1), building on previous work to facilitate gy
Externí odkaz:
http://arxiv.org/abs/2410.03928
A simple Hamiltonian modeling framework for general models in nonlinear optics is given. This framework is specialized to describe the Hamiltonian structure of electromagnetic phenomena in cubicly nonlinear optical media. The model has a simple Poiss
Externí odkaz:
http://arxiv.org/abs/2409.04891
Autor:
Fambri, Francesco, Sonnendrücker, Eric
In this manuscript we present a novel and efficient numerical method for the compressible viscous and resistive MHD equations for all Mach number regimes. The time-integration strategy is a semi-implicit splitting, combined with a hybrid finite-volum
Externí odkaz:
http://arxiv.org/abs/2407.14141
The use of gyrokinetics, wherein phase-space coordinate transformations result in a phase-space dimensionality reduction as well as removal of fast time scales, has enabled the simulation of microturbulence in fusion devices. The state-of-the-art gyr
Externí odkaz:
http://arxiv.org/abs/2403.15071
In the presence of an inhomogeneous oscillatory electric field, charged particles experience a net force, averaged over the oscillatory timescale, known as the ponderomotive force. We derive a one-dimensional Hamiltonian model which self-consistently
Externí odkaz:
http://arxiv.org/abs/2309.16807
Autor:
Bell, Dominik, Pinto, Martin Campos, Kumozec, Davor, Schnack, Frederik, Bourne, Emily, Sonnendrücker, Eric
The gyro-kinetic model is an approximation of the Vlasov-Maxwell system in a strongly magnetized magnetic field. We propose a new algorithm for solving it combining the Semi-Lagrangian (SL) method and the Arakawa (AKW) scheme with a time-integrator.
Externí odkaz:
http://arxiv.org/abs/2307.12818
Autor:
Li, Yingzhe, Pinto, Martin Campos, Holderied, Florian, Possanner, Stefan, Sonnendrücker, Eric
We explore the possibilities of applying structure-preserving numerical methods to a plasma hybrid model with kinetic ions and mass-less fluid electrons satisfying the quasi-neutrality relation. The numerical schemes are derived by finite element met
Externí odkaz:
http://arxiv.org/abs/2304.01891
We study the canonical variables based numerical schemes of a hybrid model with kinetic ions and mass-less electrons. Two equivalent formulations of the hybrid model are presented with the vector potentials in different gauges and the distribution fu
Externí odkaz:
http://arxiv.org/abs/2301.10097
Three geometric formulations of the Hamiltonian structure of the macroscopic Maxwell equations are given: one in terms of the double de Rham complex, one in terms of L2 duality, and one utilizing an abstract notion of duality. The final of these is u
Externí odkaz:
http://arxiv.org/abs/2301.08812