Multi-Hierarchy Simulation of Collisionless Driven Reconnection by Real-Space Decomposition

Usami, Shunsuke; Horiuchi, Ritoku; Ohtani, Hiroaki; Den, Mitsue

doi:10.1088/1742-6596/561/1/012021

Cited by 5 publications

(6 citation statements)

References 21 publications

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“…Therefore, much more magnetic flux can be carried from larger scales to the reconnection site. The timescale of the forcing also proves to be important (Pei et al, 2001;Pritchett, 2005;Ohtani and Horiuchi, 2009;Klimas et al, 2010;Usami et al, 2014Usami et al, , 2018.…”

Section: Other Effectsmentioning

confidence: 99%

Multi-scale simulations of particle acceleration in astrophysical systems

Marcowith

Ferrand

Grech

et al. 2020

Preprint

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This review aims at providing an up-to-date status and a general introduction to the subject of the numerical study of energetic particle acceleration and transport in turbulent astrophysical flows. The subject is also complemented by a short overview of recent progresses obtained in the domain of laser plasma experiments. We review the main physical processes at the heart of the production of a non-thermal distribution in both Newtonian and relativistic astrophysical flows, namely the first and second order Fermi acceleration processes. We also discuss shock drift and surfing acceleration, two processes important in the context of particle injection in shock acceleration. We analyze with some details the particle-in-cell (PIC) approach used to describe particle kinetics. We review the main results obtained with PIC simulations in the recent years concerning particle acceleration at shocks and in reconnection events. The review discusses the solution of Fokker-Planck problems with application to the study of particle acceleration at shocks but also in hot coronal plasmas surrounding compact objects. We continue by considering large scale physics. We describe recent developments in magnetohydrodynamic (MHD) simulations. We give a special emphasize on the way energetic particle dynamics can be coupled to MHD solutions either using a multi-fluid calculation or directly coupling kinetic and fluid calculations. This aspect is mandatory to investigate the acceleration of particles in the deep relativistic regimes to explain the highest Cosmic Ray energies.

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Section: Other Effectsmentioning

confidence: 99%

Multi-scale simulations of particle acceleration in astrophysical systems

Marcowith

Ferrand

Grech

et al. 2020

Preprint

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“…In this section, let us overview the interlocking scheme in the interface domain in the upstream direction, which is taken to be y-axis. We employ the hand-shake scheme [6,8,14,17,20] for a macroscopic quantity Q interface :…”

Section: Overview Of Hierarchy-interlockingmentioning

confidence: 99%

“…For application to magnetic reconnection, Makwana et al coupled a Hall-MHD code and a semi-implicit particle-in-cell (PIC) code [7]. Usami et al interlocked an MHD code and an explicit PIC code [8].…”

Section: Introductionmentioning

confidence: 99%

“…In 2013, we further implemented non-uniform grid points to the MHD domain in our multi-hierarchy model [17]. In 2014, we reported the influence of global plasma inflows on the physics of magnetic reconnection by using our multi-hierarchy model [8]. In addition, we installed the Adaptive Mesh Refinement (AMR) to the MHD domain in our multi-hierarchy model and demonstrated the propagation of linear Alfvén waves [18] and the driving of magnetic reconnection [19].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the Multi-Hierarchy Simulation Model Based on the Real-Space Decomposition Method

Usami

Horiuchi

Ohtani

et al. 2018

Plasma

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Multi-hierarchy simulation models aimed at analysis of magnetic reconnection were developed. Based on the real-space decomposition method, the simulation domain consists of three parts: a magnetohydrodynamics (MHD) domain, a particle-in-cell (PIC) domain, and an interface domain to communicate MHD and PIC data. In this paper, the previous model (the 1D interlocking with the upstream condition) by the authors is improved to three types of new models, i.e., two types of the 1D interlocking with the downstream condition and one type of the 2D interlocking with the upstream condition. For their verification, simulations of plasma propagation across the multiple domains were performed in the multi-hierarchy models, and it was confirmed that the new interlocking methods are physically correct.

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“…In magnetic reconnection, micro-scale dynamics is important only near reconnection points, while micro-scale dynamics is not important far from reconnection points. Usami et al developed a multi-scale simulation code [3][4][5]. They use Particle-in-Cell (PIC) method in a restricted region and perform MHD simulation in other regions.…”

Section: Introductionmentioning

confidence: 99%

Multi-Scale Simulations of Magnetic Reconnection Using Particle-in-Cell and Magnetohydrodynamics with Adaptive Mesh Refinement Technique

Ogawa

Usami

Horiuchi

et al. 2016

Plasma and Fusion Research

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We performed magnetic reconnection simulations with our simulation code. Our code is a multi-scale threedimensional plasma simulation code in which Particle-in-Cell (PIC) method is used in a restricted region and magnetohydrodynamics (MHD) simulation is performed in the rest of a simulation box. A hierarchical mesh is used in the MHD region, which is controlled by an adaptive mesh refinement (AMR) technique. Restriction of the PIC region and the adaptively controlled mesh realize treatment both of micro-scale particle dynamics and macro-scale structure with low computational costs. In this paper, we describe methods of our simulation and results of calculations.

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Multi-Hierarchy Simulation of Collisionless Driven Reconnection by Real-Space Decomposition

Cited by 5 publications

References 21 publications

Multi-scale simulations of particle acceleration in astrophysical systems

Multi-scale simulations of particle acceleration in astrophysical systems

Improvement of the Multi-Hierarchy Simulation Model Based on the Real-Space Decomposition Method

Multi-Scale Simulations of Magnetic Reconnection Using Particle-in-Cell and Magnetohydrodynamics with Adaptive Mesh Refinement Technique

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