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Exploring the Role of Turbulent Acceleration and Heating in Fractal Current Sheet of Solar Flare from Hybrid PIC and LBM Virtual Test
Zhu BJ(朱伯靖)1,2; Lin J(林隽)1,2
Source PublicationProceedings of American Geophysical Union (AGU) FALL MEETING
2016-12
DOI10.13140/RG.2.2.26293.47841
Contribution Rank第1完成单位
Indexed By其他
Conference Name2016 American Geophysical Union (AGU) FALL MEETING
Conference Date2016-12-10
Conference PlaceSan Francisco, USA
Abstract

The role of turbulent acceleration and heating in the fractal magnetic reconnection of solar flares is still not clear, especially at the X-point in the diffusion region. At virtual test aspect, it is hardly to quantitatively analyze the vortex generation, turbulence evolution, particle acceleration and heating in the magnetic islands coalesce in fractal manner, formatting into largest plasmid and ejection process in diffusion region through classical magnetohydrodynamics numerical method. With the development of physical particle numerical method (particle in cell method [PIC] , Lattice Boltzmann method [LBM] ) and high performance computing technology in recently two decades. Kinetic-dynamic simulation has developed into an effectively manner to exploring the role of magnetic field and electric field turbulence in charged particles acceleration and heating process, since all the physical aspects relating to turbulent reconnection are taken into account. In this paper, the LBM based lattice DxQy grid and extended distribution are added into charged-particles-to-grid-interpolation of PIC based finite difference time domain scheme and Yee Grid, the hybrid PIC-LBM simulation tool is developed to investigating turbulence acceleration on TIANHE-2. The actual solar coronal condition (L≈105Km,B≈50-500G,T≈5×106K, n≈108-109, mi/me≈500-1836) is applied to study the turbulent acceleration and heating in solar flare fractal current sheet. At stage I, magnetic islands shrink due to magnetic tension forces, the process of island shrinking halts when the kinetic energy of the accelerated particles is sufficient to halt the further collapse due to magnetic tension forces, the particle energy gain is naturally a large fraction of the released magnetic energy. At stage II and III, the particles from the energized group come in to the center of the diffusion region and stay longer in the area. In contract, the particles from non energized group only skim the outer part of the diffusion regions. At stage IV, the magnetic reconnection type nano-plasmoid (200km) stop expanding and carrying enough energy to eject particles as constant velocity. Last, the role of magnetic field turbulence and electric field turbulence in electron and ion acceleration at the diffusion regions in solar flare fractural current sheet is given.

Funding OrganizationN/A
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
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Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12336
Collection太阳物理研究组
Affiliation1.Yunnan Obseratories, Chinese Academy of Sciences, 110 Box, Guandu District, Kunming, 650216, P.R. China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P.R. China
Recommended Citation
GB/T 7714
Zhu BJ,Lin J. Exploring the Role of Turbulent Acceleration and Heating in Fractal Current Sheet of Solar Flare from Hybrid PIC and LBM Virtual Test[C],2016.
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