Results 21 to 30 of about 2,051 (189)
SIMULATIONS OF ELECTRON MAGNETOHYDRODYNAMIC TURBULENCE
The Astrophysical Journal, 2009 We present numerical simulations of electron magnetohydrodynamic (EMHD) and electron reduced MHD (ERMHD) turbulence. Comparing scaling relations, we find that both EMHD and ERMHD turbulence show similar spectra and anisotropy. We develop new techniques to study anisotropy of EMHD turbulence.
Alex Lazarian +2 more
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Radiation magnetohydrodynamics in global simulations of protoplanetary discs [PDF]
Astronomy & Astrophysics, 2013 Our aim is to study the thermal and dynamical evolution of protoplanetary disks in global simulations, including the physics of radiation transfer and magneto-hydrodynamic (MHD) turbulence caused by the magneto-rotational instability. We develop a radiative transfer method based on the flux-limited diffusion approximation that includes frequency ...
Flock, M. +3 more
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A test suite for magnetohydrodynamical simulations
The Astrophysical Journal, 1992 A collection is presented of MHD problems that will provide researchers who have interests in modeling MHD phenomena with a battery of tests (a 'test suite') for calibrating their numerical algorithms. Use of these tests will provide a common reference for comparison of different numerical MHD algorithms. The test suite includes both 1D and 2D problems.
John F. Hawley +4 more
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Three-dimensional magnetohydrodynamic simulations of the Crab nebula [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 In this paper we give a detailed account of the first 3D relativistic magnetohydrodynamic (MHD) simulations of Pulsar Wind Nebulae (PWN), with parameters most suitable for the Crab Nebula. In order to clarify the new features specific to 3D models, reference 2D simulations have been carried out as well.
Serguei S. Komissarov +3 more
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RESISTIVE MAGNETOHYDRODYNAMICS SIMULATIONS OF THE IDEAL TEARING MODE [PDF]
The Astrophysical Journal, 2015 We study the linear and nonlinear evolution of the tearing instability on thin current sheets by means of two-dimensional numerical simulations, within the framework of compressible, resistive magnetohydrodynamics. In particular we analyze the behavior of current sheets whose inverse aspect ratio scales with the Lundquist number $S$ as $S^{-1/3}$. This
L. Del Zanna +6 more
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The Astrophysical Journal, 2023 Nonequilibrium ionization (NEI) is essentially required for astrophysical plasma diagnostics once the plasma status departs from the assumption of ionization equilibrium.
Chengcai Shen +2 more
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Disk modelling by radiation-magnetohydrodynamic simulations [PDF]
EPJ Web of Conferences, 2012 Historically, various accretion models have been discussed under radially one-zone approximations. In such one-zone models, however, dynamical aspects of the accretion flow, such as internal circulation and outflows, have been totally neglected. Further, the disk viscosity is usually described by the phenomenological α-viscosity model.
Shin Mineshige +2 more
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The Formation of Star-forming Disks in the TNG50 Simulation
The Astrophysical Journal, 2023 We investigate the disk formation process in the TNG50 simulation, examining the profiles of SFR surface density (Σ _SFR ), gas inflow and outflow, and the evolution of the angular momentum of inflowing gas particles.
Enci Wang, Simon J. Lilly
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Striped Jets in Post–Neutron Star Merger Systems
The Astrophysical Journal, 2023 Models invoking magnetic reconnection as the particle acceleration mechanism within relativistic jets often adopt a gradual energy dissipation profile within the jet. However, such a profile has yet to be reproduced in first-principles simulations.
Emma Kaufman +4 more
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Global Magnetohydrodynamical Simulations of Accretion Tori [PDF]
The Astrophysical Journal, 2000 Global time-dependent simulations provide a means to investigate time-dependent dynamic evolution in accretion disks. This paper seeks to extend previous local simulations by beginning a systematic effort to develop fully global three-dimensional simulations.
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