Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Stefan Possanner"'
Publikováno v:
Journal of Computational Physics
We present a STRUcture-Preserving HYbrid code - STRUPHY - for the simulation of magneto-hydrodynamic (MHD) waves interacting with a population of energetic particles far from thermal equilibrium (kinetic species). The implemented model features linea
Publikováno v:
Journal of Computational Physics
We applied two numerical methods both belonging to the class of finite element particle-in-cell methods to a four-dimensional (one dimension in real space and three dimensions in velocity space) hybrid plasma model for electrons in a stationary, neut
Autor:
Stefan Possanner
Publikováno v:
Journal of Mathematical Physics
The gyrokinetic paradigm in the long wavelength regime is reviewed from the perspective of variational averaging (VA). The VA-method represents a third pillar for averaging kinetic equations with highly-oscillatory characteristics, besides classical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f761f31e3f60e19834b7c7c14212071
https://hdl.handle.net/21.11116/0000-0001-FDFD-621.11116/0000-0001-FDFF-421.11116/0000-0001-FFF7-A
https://hdl.handle.net/21.11116/0000-0001-FDFD-621.11116/0000-0001-FDFF-421.11116/0000-0001-FFF7-A
Publikováno v:
Computer Physics Communications
Computer Physics Communications, 2017, 219, pp.164-177
Computer Physics Communications, Elsevier, 2017, 219, pp.164-177
Computer Physics Communications, 2017, 219, pp.164-177
Computer Physics Communications, Elsevier, 2017, 219, pp.164-177
We present a numerical scheme for the ion Euler equations with Braginskii closure, in the quasi-neutral regime with an adiabatic electron response. The scheme is constructed with the aid of asymptotic-preserving (AP) techniques in order to avoid the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee38dc0c8ee48b6e9c4894145eeb70e0
https://hal.science/hal-01979763
https://hal.science/hal-01979763
Autor:
Claudia Negulescu, Stefan Possanner
Publikováno v:
Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal
Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, Society for Industrial and Applied Mathematics, 2016, 14 (2), pp.839-873
Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 2016, 14 (2), pp.839-873
Multiscale Modeling & Simulation
Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, Society for Industrial and Applied Mathematics, 2016, 14 (2), pp.839-873
Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 2016, 14 (2), pp.839-873
Multiscale Modeling & Simulation
We derive closure relations for a plasma fluid model, issued from the BGK equation for electrons in a strong magnetic field. Our scaling of the BGK equation leads in the asymptotic limit $\varepsilon \to 0$ towards the adiabatic electron regime, wher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d74288031bc1c20b80ead352e14f4cf
https://hal.archives-ouvertes.fr/hal-01979749
https://hal.archives-ouvertes.fr/hal-01979749
Autor:
Claudia Negulescu, Stefan Possanner
Publikováno v:
Kinetic & Related Models. 4:1159-1191
The aim of the present paper is the mathematical study of a linear Boltzmann equation with different matrix collision operators, modelling the spin-polarized, semi-classical electron transport in non-homogeneous ferromagnetic structures. In the colli
Publikováno v:
Advanced Functional Materials. 19:958-967
Recently, it has been shown by several groups that the electrical characteristics of organic thin-film transistors (OTFTs) can be significantly influenced by depositing self-assembled monolayers (SAMs) at the organic semiconductor/dielectric interfac
Publikováno v:
Communications in Mathematical Sciences
Communications in Mathematical Sciences, 2015, 13 (6), pp.1347-1378. ⟨10.4310/CMS2015.v13.n6.a1⟩
Communications in Mathematical Sciences, International Press, 2015, 13 (6), pp.1347-1378. 〈10.4310/CMS2015.v13.n6.a1〉
Communications in Mathematical Sciences, International Press, 2015, 13 (6), pp.1347-1378. ⟨10.4310/CMS2015.v13.n6.a1⟩
Communications in Mathematical Sciences, 2015, 13 (6), pp.1347-1378. ⟨10.4310/CMS2015.v13.n6.a1⟩
Communications in Mathematical Sciences, International Press, 2015, 13 (6), pp.1347-1378. 〈10.4310/CMS2015.v13.n6.a1〉
Communications in Mathematical Sciences, International Press, 2015, 13 (6), pp.1347-1378. ⟨10.4310/CMS2015.v13.n6.a1⟩
International audience
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbd1da5b882884b53a5e4492ec243558
https://hal.science/hal-01166320
https://hal.science/hal-01166320
Publikováno v:
Journal of Computational Physics
Journal of Computational Physics, Elsevier, 2015, 280, pp.602-625
Journal of Computational Physics, 2015, 280, pp.602-625
Journal of Computational Physics, Elsevier, 2015, 280, pp.602-625
Journal of Computational Physics, 2015, 280, pp.602-625
In this work, a new numerical scheme for the reduced resistive MHD system (RMHD) is presented. Numerical simulations of RMHD are notoriously challenging because of the disparate time-scales, encompassing the Alfven wave period and the resistive diffu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5db206dc9d36b88b48af8283cab4bf30
https://hal.archives-ouvertes.fr/hal-01979747
https://hal.archives-ouvertes.fr/hal-01979747
Autor:
Stefan Possanner, Benjamin A. Stickler
Publikováno v:
Physical Review A. 88
We systematically derive a linear quantum collision operator for the spinorial Wigner transport equation from the dynamics of a composite quantum system. For suitable two particle interaction potentials, the particular matrix form of the collision op