Development of New computational Methods in Geo-magnetohydrodynamics

地磁流体动力学新计算方法的发展

• 批准号: 05302024
• 负责人: TERASAWA Toshio
• 金额: $ 9.54万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05302024/
• 关键词: Computational Physics; Parallel Processing; Magnetic Reconnection; Magnetohydrodynamic Turbulence; Nonlinear Plasma Waves; Fiinite-volume TVD Scheme; Magnetohydrodynamic Dynamo; Wavelet Analysis; 設併計算; ウエーブレット解析

New findings/development from this research project is as follows :1)Parallel processing algorithm for the MHD problems.Visualization methods are also established.2)New models for the solar wind-planetary magnetosphere interaction, and the magnetospheric convection problem.New simulation scheme for the finite-electron-mass two-fluid MHD/hybrid calculationEvidence of nonlinear cascade process in magnetotail turbulenceNew theoretical foundation for MHD intermediate shocksDiscovery of the stochastic acceleration process in slow shocks3)Parallel prosessing algorithm for the spherical harmonic expansion method4)Application of the wavelet analysis to the magnetotail turbulence

本研究的新发现/进展如下：1)MHD问题的并行处理算法。还建立了可视化方法。2)太阳风-行星磁层相互作用的新模型，以及磁层对流问题。有限电子-质量双流体MHD/混合计算的新模拟方案磁尾湍流中非线性级联过程的证据MHD中间激波新的理论基础发现慢激波中随机加速过程3)球谐展开法的并行处理算法4)小波分析在磁尾湍流中的应用

项目成果

K.Sato: "Vertical Structure of Atmospheric Gravity Waves Revealed by the Wavelet Analysis" J.Geophys.Res.99. 20623-20631 (1994)

K.Sato：“小波分析揭示的大气重力波的垂直结构”J.Geophys.Res.99。

M.Fujimoto: "Anomalous ion mixing within an MHD scale Kelvin-Helmholtz vortex2.Effects of inhomogeneity" J.Geophys.Res.(in press).

M.Fujimoto：“MHD 尺度开尔文-亥姆霍兹涡旋 2 内的异常离子混合。不均匀性的影响”J.Geophys.Res.（正在出版）。

M.Matsushima: "Fluid Motion in the Earth's Core Derived from the Geomagnetic Field and Its Implications for the Geodynamo" Journal of Geomagnetism and Geoelectricity. 45. 1481-1495 (1993)

M.Matsushima：“地磁场产生的地球核心的流体运动及其对地球发电机的影响”地磁学和地电杂志。

M.Fujimoto: "Anomalous Ion Mixing within of MHD Kelvin-Helmholtz Vortex" J.Geophys.Res.(in press). (1994)

M.Fujimoto：“MHD 开尔文-亥姆霍兹涡旋内的异常离子混合”J.Geophys.Res.（正在出版）。

T.Ogino: "A Global Magnetohydrodynamic Simulation of the Response of the Magnetosphere to a Northward Turning of the Interplanetary Magnetic Field" J.Geophys.Res.99. 11027-11042 (1994)

T.Ogino：“磁层对行星际磁场北转响应的全球磁流体动力学模拟”J.Geophys.Res.99。