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The role of a super-Alfv\'enic plasmoid instability in the onset of fast reconnection is studied by means of the largest Hall magnetohydrodynamics simulations to date, with system sizes up to $10^{4}$ ion skin depths ($d_{i}$). It is…

等离子体物理 · 物理学 2011-07-28 Yi-Min Huang , A. Bhattacharjee , Brian P. Sullivan

Magnetic reconnection in partially ionized plasmas is a ubiquitous phenomenon spanning the range from laboratory to intergalactic scales, yet it remains poorly understood and relatively little studied. Here, we present results from a…

等离子体物理 · 物理学 2014-03-04 James E Leake , Vyacheslav S Lukin , Mark G Linton

For the first time to our knowledge, we demonstrate fast magnetic reconnection near a magnetic null point in a fluid model of collisionless pair plasma without resorting to the contrivance of anomalous resistivity. In particular, we…

等离子体物理 · 物理学 2010-10-04 E. Alec Johnson , James A. Rossmanith

Relativistic magnetic reconnection is a key process for accelerating charged particles and producing high-energy radiation. We study this process using relativistic resistive magnetohydrodynamics simulations. Starting with Harris sheet…

等离子体物理 · 物理学 2025-06-23 Harihar Pradhan , Kirit D Makwana , Bart Ripperda

Magnetic reconnection may be the fundamental process allowing energy stored in magnetic fields to be released abruptly, solar flares and coronal mass ejection (CME) being archetypal natural plasma examples. Magnetic reconnection is much too…

等离子体物理 · 物理学 2019-09-17 Alkendra Singh , Fulvia Pucci , Anna Tenerani , Kazunari Shibata , Andrew Hillier , Marco Velli

This is a brief account of our numerical study of the tearing mode reconnection. We demonstrate two main points. First, we show that, given sufficiently small resistivity, the Rutherford regime always exists; larger values of Delta' require…

等离子体物理 · 物理学 2007-05-23 N. F. Loureiro , S. C. Cowley , W. D. Dorland , M. G. Haines , A. A. Schekochihin

Using Monte Carlo Simulation and fundamental measure theory we study the phase diagram of a two-dimensional lattice gas model with a nearest neighbor hard core exclusion and a next-to-nearest neighbors finite repulsive interaction. The…

软凝聚态物质 · 物理学 2012-02-02 Noe G. Almarza , Jose A. Capitan , Jose A. Cuesta , Enrique Lomba

A new multidimensional simulation code for relativistic two-fluid electrodynamics (RTFED) is described. The basic equations consist of the full set of Maxwell's equations coupled with relativistic hydrodynamic equations for separate two…

高能天体物理现象 · 物理学 2016-11-09 Takanobu Amano

The fast rates of magnetic reconnection found in both nature and experiments are important to understand theoretically. Recently, it was demonstrated that two-fluid magnetic reconnection remains fast in the strong guide field regime,…

等离子体物理 · 物理学 2015-05-20 A. Stanier , Andrei N. Simakov , L. Chacon , W. Daughton

Numerical simulations with self-similar initial and boundary conditions provide a link between theoretical and numerical investigations of jet dynamics. We perform axisymmetric resistive magnetohydrodynamic (MHD) simulations for a…

天体物理学 · 物理学 2009-11-13 Miljenko Cemeljic , Jose Gracia , Nektarios Vlahakis , Kanaris Tsinganos

In an idealized system where four current channels interact in a two-dimensional periodic setting, we follow the detailed evolution of current sheets (CSs) forming in between the channels, as a result of a large-scale merging. A central…

太阳与恒星天体物理 · 物理学 2021-10-04 Xiaozhou Zhao , Fabio Bacchini , Rony Keppens

In this paper, we investigate a simple model where two, initially unconnected, flux systems are forced to interact in response to the imposed boundary driving by solving the non-ideal 3D MHD equations numerically. The reconnection rate of…

天体物理学 · 物理学 2007-05-23 K. Galsgaard , C. Parnell

This work presents a 2.5-dimensional simulation study of the instability of current-sheets located in a medium with a strong density variation along the current layer. The initial force-free configuration is observed to undergo a two-stage…

太阳与恒星天体物理 · 物理学 2015-05-13 Lapo Bettarini , Giovanni Lapenta

The rate of magnetic reconnection is of the utmost importance in a variety of processes because it controls, for example, the rate energy is released in solar flares, the speed of the Dungey convection cycle in Earth's magnetosphere, and…

等离子体物理 · 物理学 2022-04-29 Yi-Hsin Liu , Paul Cassak , Xiaocan Li , Michael Hesse , Shan-Chang Lin , Kevin Genestreti

We consider the numerical approximations of a two-phase hydrodynamics coupled phase-field model that incorporates the variable densities, viscosities and moving contact line boundary conditions. The model is a nonlinear, coupled system that…

数值分析 · 数学 2017-02-15 Haijun Yu , Xiaofeng Yang

Magnetic reconnection is an explosive process that accelerates particles to high energies in Earth's magnetosphere, offering a unique natural laboratory to study this phenomenon. This study investigates how well data-driven fully kinetic…

空间物理 · 物理学 2026-02-18 Nadja Reisinger , Fabio Bacchini

Over the past decade, Boozer has argued that three-dimensional (3D) magnetic reconnection fundamentally differs from two-dimensional (2D) reconnection due to the fact that the separation between any pair of neighboring field lines almost…

等离子体物理 · 物理学 2022-12-28 Yi-Min Huang , Amitava Bhattacharjee

We propose the Galactic flare model for the origin of the X-ray gas in the Galactic halo. For this purpose, we examine the magnetic reconnection triggered by Parker instability (magnetic buoyancy instability), by performing the…

天体物理学 · 物理学 2009-11-07 S. Tanuma , T. Yokoyama , T. Kudoh , K. Shibata

The interaction of a Mach 1.45 shock wave with a perturbed planar interface between sulphur hexafluoride and air is studied through high-resolution two-dimensional (2D) and three-dimensional (3D) shock-capturing adaptive mesh refinement…

流体动力学 · 物理学 2019-09-13 Man Long Wong , Daniel Livescu , Sanjiva K. Lele

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