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Within the resistive magnetohydrodynamic model, high-Lundquist number reconnection layers are unstable to the plasmoid instability, leading to a turbulent evolution where the reconnection rate can be independent of the underlying…

等离子体物理 · 物理学 2019-09-04 A. Stanier , W. Daughton , A. Le , X. Li , R. Bird

Magnetic reconnection in an antiparallel uniform Harris current sheet equilibrium, which is initially perturbed by a region of enhanced resistivity limited in all three dimensions, is investigated through compressible magnetohydrodynamic…

天体物理学 · 物理学 2009-10-31 Joerg Schumacher , Bernhard Kliem , Norbert Seehafer

A simple Sweet--Parker-like model for the electron current layer in resistive Hall magnetohydrodynamic (MHD) reconnection is presented, with the focus on the collisionless limit. The derivation readily recovers the main results obtained…

太阳与恒星天体物理 · 物理学 2015-05-13 Dmitri A. Uzdensky

A detailed numerical study of magnetic reconnection in resistive MHD for very large, previously inaccessible, Lundquist numbers ($10^4\le S\le 10^8$) is reported. Large-aspect-ratio Sweet-Parker current sheets are shown to be unstable to…

太阳与恒星天体物理 · 物理学 2015-05-13 R. Samtaney , N. F. Loureiro , D. A. Uzdensky , A. A. Schekochihin , S. C. Cowley

Relativistic Sweet-Parker type magnetic reconnection is investigated by relativistic resistive magnetohydrodynamic (RRMHD) simulations. As an initial setting, we assume anti-parallel magnetic fields and a spatially uniform resistivity. A…

高能天体物理现象 · 物理学 2015-05-30 Hiroyuki R. Takahashi , Takahiro Kudoh , Youhei Masada , Jin Matsumoto

Starting from an exact, steady-state, force-free solution of the magnetohydrodynamic (MHD) equations, we investigate how resistive current layers are induced by perturbing line-tied three-dimensional magnetic equilibria. This is achieved by…

太阳与恒星天体物理 · 物理学 2016-01-12 Frederic Effenberger , I. J. D. Craig

In this paper two theoretical approaches for the calculation of the rate of quasi-stationary, two-dimensional magnetic reconnection with nonuniform anomalous resistivity are considered in the framework of incompressible magnetohydrodynamics…

天体物理学 · 物理学 2015-06-24 Leonid Malyshkin , Russell M. Kulsrud

Plasmoid-mediated reconnection plays a fundamental role in different solar atmospheric phenomena. Numerical reproduction of this process is therefore essential for developing robust solar models. Our goal is to assess plasmoid-mediated…

太阳与恒星天体物理 · 物理学 2024-03-13 Øystein Håvard Færder , Daniel Nóbrega-Siverio , Mats Carlsson

The manner in which the rate of magnetic reconnection scales with the Lundquist number in realistic three-dimensional (3D) geometries is still an unsolved problem. It has been demonstrated that in 2D rapid non-linear tearing allows the…

等离子体物理 · 物理学 2015-06-19 P. F. Wyper , D. I Pontin

Reconnection rate is found for the canonical simplest case of steady-state two-dimensional symmetric reconnection in an incompressible plasma by matching of outer Petschek solution and internal diffusion region solution. The reconnection…

等离子体物理 · 物理学 2007-05-23 Nikolai V. Erkaev , Vladimir S. Semenov , Ferdinand Jamitzky

Magnetic reconnection is a fundamental mechanism in astrophysics. A common challenge in mimicking this process numerically in particular for the Sun is that the solar electrical resistivity is small compared to the diffusive effects caused…

太阳与恒星天体物理 · 物理学 2023-07-05 Øystein Håvard Færder , Daniel Nóbrega-Siverio , Mats Carlsson

Using a three-dimensional magnetohydrodynamic model, we simulate the magnetic reconnection in a single current sheet. We assume a finite guide field, a random perturbation on the velocity field and uniform resistivity. Our model enhances…

太阳与恒星天体物理 · 物理学 2015-09-23 Shuoyang Wang , Takaaki Yokoyama , Hiroaki Isobe

A theoretical model of quasi-stationary, two-dimensional magnetic reconnection is presented in the framework of incompressible two-fluid magnetohydrodynamics (MHD). The results are compared with recent numerical simulations and experiment.

太阳与恒星天体物理 · 物理学 2009-12-11 Leonid M. Malyshkin

We conduct a multiparametric study of driven magnetic reconnection relevant to recent experiments on colliding magnetized laser produced plasmas using particle-in-cell simulations. Varying the background plasma density, plasma resistivity,…

等离子体物理 · 物理学 2018-06-15 K. V. Lezhnin , W. Fox , J. Matteucci , D. B. Schaeffer , A. Bhattacharjee , M. J. Rosenberg , K. Germaschewski

We examine the dynamics of turbulent reconnection in 2D and 3D reduced MHD by calculating the effective dissipation due to coupling between small-scale fluctuations and large-scale magnetic fields. Sweet-Parker type balance relations are…

天体物理学 · 物理学 2009-11-06 Eun-Jin Kim , P. H. Diamond

We present a detailed analysis of the properties of magnetic reconnection at large-scale current sheets in a high cadence version of the Lynch & Edmondson (2013) 2.5D MHD simulation of sympathetic magnetic breakout eruptions from a…

太阳与恒星天体物理 · 物理学 2016-07-19 B. J. Lynch , J. K. Edmondson , M. D. Kazachenko , S. E. Guidoni

This paper analytically investigates a series of two-dimensional MHD reconnection solutions over a wide variation of magnetic Reynolds number ($R_{em}^*$). A new series of solutions explains a continuous transition from Petschek-like fast…

天体物理学 · 物理学 2011-02-11 Shin-ya Nitta

(abridged) Magnetic reconnection is the topological reconfiguration of the magnetic field in a plasma, accompanied by the violent release of energy and particle acceleration. Reconnection is as ubiquitous as plasmas themselves, with solar…

等离子体物理 · 物理学 2015-07-29 N. F. Loureiro , D. A. Uzdensky

The magnetic reconnection process is studied in relativistic pair plasmas when the thermal and inertial properties of the magnetohydrodynamical fluid are included. We find that in both Sweet-Parker and Petschek relativistic scenarios there…

等离子体物理 · 物理学 2015-02-20 Luca Comisso , Felipe A. Asenjo

We use extensive 3D resistive MHD simulations to study how large-scale current sheets will undergo fast reconnection in the high Lundquist number $S$ limit (above $\sim 10^4$), when the system is subject to different externally driven…

太阳与恒星天体物理 · 物理学 2022-04-06 Yang Liping , Li Hui , Guo Fan , Li Xiaocan , Li Shengtai , He jiansen , Zhang Lei , Feng Xueshang