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We present results of three-dimensional (3D) simulations of the magnetohydrodynamic Kelvin-Helmholtz instability in a stratified shear layer. The magnetic field is taken to be uniform and parallel to the shear flow. We describe the…

天体物理学 · 物理学 2009-10-31 M. Brüggen , W. Hillebrandt

Forced magnetic reconnection, a reconnection event triggered by external perturbation, should be ubiquitous in the solar corona. Energy released during such cases can be much greater than that which was introduced by the perturbation. It is…

太阳与恒星天体物理 · 物理学 2019-02-27 Max Potter , Philippa Browning , Mykola Gordovskyy

Magnetic reconnection is the key to explosive phenomena in the universe. The flux rope is crucial in three-dimensional magnetic reconnection theory and are commonly considered to be generated by secondary tearing mode instability. Here we…

We present recent 3-D MHD numerical simulations of the non-linear dynamical evolution of magnetic flux tubes in an adiabatically stratified convection zone in spherical geometry, using the anelastic spherical harmonic (ASH) code. We seek to…

天体物理学 · 物理学 2009-06-25 L. Jouve , A. S. Brun

The nonlinear evolution of relativistic magnetic reconnection in sheared magnetic configuration (with a guide field) is investigated by using two-dimensional relativistic two-fluid simulations. Relativistic guide field reconnection features…

高能天体物理现象 · 物理学 2014-11-20 Seiji Zenitani , Michael Hesse , Alex Klimas

Magnetic field fluctuations in MHD turbulence can be viewed as current sheets that are progressively more anisotropic at smaller scales. As suggested by Loureiro & Boldyrev (2017) and Mallet et al (2017), below a certain critical thickness…

等离子体物理 · 物理学 2017-08-09 Stanislav Boldyrev , Nuno F. Loureiro

Magnetic reconnection in naturally occurring and laboratory settings often begins locally and elongates, or spreads, in the direction perpendicular to the plane of reconnection. Previous work has largely focused on current sheets with a…

等离子体物理 · 物理学 2023-04-05 Milton Arencibia , P. A. Cassak , M. A. Shay , Jiong Qiu , Steven M. Petrinec , Haoming Liang

Models for collisionless magnetic reconnection in near-Earth space are distinctly characterized as 2D or 3D. In 2D kinetic models, the frozen-in law for the electron fluid is usually broken by laminar dynamics involving structures set by…

Flux emergence is ubiquitous in the Sun's lower atmosphere, where the emerging magnetic flux can reconnect with the pre-existing magnetic field. We investigate plasmoid formation and the resulting multi-thermal emissions during…

太阳与恒星天体物理 · 物理学 2025-08-18 Guanchong Cheng , Lei Ni , Robert Cameron , Hardi Peter , Yajie Chen , Jun Lin

We present a study of collisionless magnetic reconnection within the framework of full two-fluid MHD for a completely ionized hydrogen plasma, retaining the effects of the Hall current, electron pressure and electron inertia. We performed…

等离子体物理 · 物理学 2015-06-18 N. Andrés , L. Martin , P. Dmitruk , D. Gómez

The spontaneous evolution of magnetic reconnection in generalized situations (with thermodynamic asymmetry regarding the current sheet and magnetic shear) is investigated using two-dimensional magnetohydrodynamic simulation. We focus on the…

太阳与恒星天体物理 · 物理学 2022-09-14 Shin-ya Nitta , Koji Kondoh

We present 3D simulations of semirelativistic collisionless magnetic reconnection, where upstream ions are subrelativistic while electrons are ultrarelativistic. We employ the realistic proton-to-electron mass ratio and explore a range of…

高能天体物理现象 · 物理学 2025-09-03 Fabio Bacchini , Gregory R. Werner , Camille Granier , Jesse Vos

During relativistic magnetic reconnection, antiparallel magnetic fields undergo a rapid change in topology, releasing a large amount of energy in the form of non-thermal particle acceleration. This work explores the application of mesh…

We investigate the impact of turbulence on magnetic reconnection through high-resolution 3D magnetohydrodynamical (MHD) simulations, spanning Lundquist numbers from $S=10^3$ to $10^6$. Building on Lazarian and Vishniac's (1999) theory,…

等离子体物理 · 物理学 2025-10-02 Giovani H. Vicentin , Grzegorz Kowal , Elisabete M. de Gouveia Dal Pino , Alex Lazarian

We perform 3D relativistic ideal MHD simulations to study the collisions between high-$\sigma$ (Poynting-flux-dominated) blobs which contain both poloidal and toroidal magnetic field components. This is meant to mimic the interactions…

高能天体物理现象 · 物理学 2015-06-03 Wei Deng , Hui Li , Bing Zhang , Shengtai Li

The spreading of the X-line out of the reconnection plane under a strong guide field is investigated using large-scale three-dimensional (3D) particle-in-cell (PIC) simulations in asymmetric magnetic reconnection. A simulation with a thick,…

空间物理 · 物理学 2020-02-12 Tak Chu Li , Yi-Hsin Liu , Michael Hesse , Ying Zou

In situ spacecraft data on the solar wind show events identified as magnetic reconnection with outflows and apparent "`$X$-lines" $10^{3-4}$ times ion scales. To understand the role of turbulence at these scales, we make a case study of an…

Kinetic simulations of 3D collisionless magnetic reconnection with a guide field show a dramatic enhancement of energetic electron production when compared with 2D systems. In the 2D systems, electrons are trapped in magnetic islands that…

等离子体物理 · 物理学 2015-11-17 J. T. Dahlin , J. F. Drake , M. Swisdak

We analyze 3D numerical simulations of driven incompressible magnetohydrodynamic (MHD) turbulence in a periodic box threaded by a moderately strong external magnetic field. We sum over nonlinear interactions within Fourier wavebands and…

天体物理学 · 物理学 2011-05-10 Jungyeon Cho , Alex Lazarian , Ethan Vishniac

Although magnetic reconnection takes place in three-dimensional space, reconnection theory has focused on two-dimensional models for more than sixty years. Well-posed three-dimensional mathematics associated with the theory of fluid mixing…

等离子体物理 · 物理学 2020-02-12 Allen H Boozer