Zobrazeno 1 - 10 of 39 pro vyhledávání: '"Markus Held"'
1
Beyond the Oberbeck-Boussinesq and long wavelength approximation
Autor: Markus Held, Matthias Wiesenberger
Publikováno v: Nuclear Fusion (0029-5515) vol.63(2023)
Held, M & Wiesenberger, M 2023, ' Beyond the Oberbeck–Boussinesq and long wavelength approximation ', Nuclear Fusion, vol. 63, no. 2, 026008 . https://doi.org/10.1088/1741-4326/aca9e0
We present the first simulations of a reduced magnetized plasma model that incorporates both arbitrary wavelength polarization and non-Oberbeck–Boussinesq effects. Significant influence of these two effects on the density, electric potential and E
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b09b8c674a2019e6be8c3a308490d38
https://research.chalmers.se/en/publication/534237
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2
Conservation of currents in reduced full-F electromagnetic kinetic and fluid models
Autor: Anders Henry Nielsen, Jens Juul Rasmussen, Henrik Järleblad, Raúl Gerrú, Volker Naulin, Markus Held, Matthias Wiesenberger
Publikováno v: Gerrú, R, Wiesenberger, M, Held, M, Nielsen, A H, Naulin, V, Rasmussen, J J & Jarleblad, H 2022, ' Conservation of currents in reduced full-F electromagnetic kinetic and fluid models ', Plasma Physics and Controlled Fusion, vol. 64, no. 5, 054005 . https://doi.org/10.1088/1361-6587/ac55f6
In this paper, we present an analysis of the conservation of currents in a full-F electromagnetic gyro-kinetic model in the long-wavelength limit. This equation corresponds to what is usually called the ‘vorticity equation’, which is not strictly
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7a271d2e1f57db098fa503a1d17cd71
https://orbit.dtu.dk/en/publications/b6540d23-d220-4cff-88eb-006fb4294ddf
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3
Angular momentum and rotational energy of mean flows in toroidal magnetic fields
Autor: Markus Held, Matthias Wiesenberger
Publikováno v: Wiesenberger, M & Held, M 2020, ' Angular momentum and rotational energy of mean flows in toroidal magnetic fields ', Nuclear Fusion, vol. 60, no. 9, 096018 . https://doi.org/10.1088/1741-4326/ab9fa8
Nuclear Fusion
Nuclear Fusion (0029-5515) vol.60(2020)
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 momentum are given by the covariant poloidal and toroidal components of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::312a9aa8cb90d194d56c7151c9b8397c
https://orbit.dtu.dk/en/publications/1d061d14-291d-4dd5-a98c-48be0613fcb5
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5
Building Information Modeling : implementation within structural design
Autor: Ragna Kepplin, Martina Schnellenbach-Held, Markus Held
Publikováno v: Bautechnik. 94:220-226
Mit Building Information Modeling (BIM) wird der Planungsprozess von Bauprojekten grundlegend verandert. Dies bedeutet fur alle Planungsbeteiligten, sich mit neuen Arbeitsprozessen und neuen Softwaretools vertraut zu machen. Grundlage fur die neue Ar
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be0bab102d30253575251dfdc384b1b5
https://doi.org/10.1002/bate.201700003
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6
Reproducibility, accuracy and performance of the Feltor code and library on parallel computer architectures
Autor: Lukas Einkemmer, Matthias Wiesenberger, Roman Iakymchuk, X. Sáez, Markus Held, Albert Gutierrez-Milla
Publikováno v: Wiesenberger, M, Einkemmer, L, Held, M, Gutierrez-Milla, A, Saez, X & Iakymchuk, R 2019, ' Reproducibility, accuracy and performance of the Feltor code and library on parallel computer architectures ', Computer Physics Communications, vol. 238, pp. 145-156 . https://doi.org/10.1016/j.cpc.2018.12.006
Computer Physics Communications
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 laptop CPUs to multi-GPU distributed memory systems. Feltor consists of bo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69caef2c47ca4f5cb37f2e3edbda2acb
https://orbit.dtu.dk/en/publications/239dce81-a326-4cf1-a066-fb686ac4b082
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7
Elektronická kniha
Moralische Motivation in der Stoa und bei Augustinus
Autor: Markus Held
Die Frage, warum man moralisch sein soll, ist eine der ältesten und schwierigsten Fragen der Moraltheorie: Wie kann der Mensch dem moralischen Anspruch, dem er untersteht, gerecht werden? In welchem Verhältnis stehen moralische Urteile und Überzeu
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8
Streamline integration as a method for structured grid generation in X-point geometry
Autor: Matthias Wiesenberger, Alexander Kendl, Markus Held, Lukas Einkemmer
Publikováno v: Wiesenberger, M, Held, M, Einkemmer, L & Kendl, A 2018, ' Streamline integration as a method for structured grid generation in X-point geometry ', Journal of Computational Physics, vol. 373, pp. 370-384 . https://doi.org/10.1016/j.jcp.2018.07.007
Journal of Computational Physics
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 exist if and only if the Laplacian of the flux-function vanishes at the X-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::005f62d3703e25b87ea81485cabdd26d
http://arxiv.org/abs/1803.10507
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9
Non-Oberbeck–Boussinesq zonal flow generation
Autor: Matthias Wiesenberger, Markus Held, Alexander Kendl, Ralph Kube
Publikováno v: Held, M, Wiesenberger, M, Kube, R & Kendl, A 2018, ' Non-Oberbeck–Boussinesq zonal flow generation ', Nuclear Fusion, vol. 58, no. 10, 104001 . https://doi.org/10.1088/1741-4326/aad28e
Nuclear Fusion
Source at https://doi.org/10.1088/1741-4326/aad28e. 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) regime ZFs are dr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24b6b40faaa008e71eb828e83ebf61c0
https://orbit.dtu.dk/en/publications/ad5451e1-051b-404d-8875-8a9bd0e9177c
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10
Lattice Boltzmann model for collisionless electrostatic drift wave turbulence obeying Charney–Hasegawa–Mima dynamics
Autor: Markus Held, Alexander Kendl
Publikováno v: Journal of Computational Physics
A lattice Boltzmann method (LBM) approach to the Charney-Hasegawa-Mima (CHM) model for adiabatic drift wave turbulence in magnetised plasmas, is implemented. The CHM-LBM model contains a barotropic equation of state for the potential, a force term in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bc052e0af8057edf36c582a74879115
https://doi.org/10.1016/j.jcp.2015.06.018
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