Collaborative Research: GEM: Global Simulations of Non-Ideal Transport in the Magnetotail

合作研究：GEM：磁尾非理想输运的全局模拟

• 批准号: 1404599
• 负责人: John Lyon
• 金额: $ 21万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1404599&HistoricalAwards=false
• 关键词: Collaborative; Research; GEM; Global; Simulations

Plasma from the tail reconnection site is transported into the inner magnetosphere where it forms the ring current. The most common type of model for studying this transport is a global magnetohydrodynamic (MHD) model. These are frequently coupled with models of the plasma transport in the inner magnetosphere since MHD models do not describe the physics well in the inner magnetosphere. This is a project to enhance the physics of the MHD models in the tail where they work best. This effort will add diamagnetic (pressure driven) drifts, inertial drifts, finite Larmor radius effects on the pressure tensor, and the energy dependence of these drifts. The improved model will be used to study magnetospheric convection, fast bursty bulk flows and dipolarization fronts, the Kelvin-Helmholtz instability and the structure of thin current sheets.The improved simulation code when coupled with an inner magnetosphere model will be useful in studying transport during magnetic storms. Therefore it will valuable for space weather studies. Since space weather represents a series hazard this work may be of significant societal value.

尾部重新连接位点的血浆被运输到形成环电流的内部磁层中。研究这种运输的最常见模型是全球磁流失动力学（MHD）模型。这些经常与内部磁层中的血浆转运模型相结合，因为MHD模型不能很好地描述内部磁层中的物理。这是一个项目，可以增强尾巴上最佳工作的MHD模型的物理。 这项工作将增加磁磁性（压力驱动）漂移，惯性漂移，有限的拉莫尔半径对压力张量的影响以及这些漂移的能量依赖性。改进的模型将用于研究磁层对流，快速爆发的大量流和偶极化前端，开尔文 - 霍尔姆霍尔茨不稳定性和薄电流板的结构。与内部磁层模型耦合时，改进的仿真代码将在研究过程中在研究运输过程中在研究运输过程中在研究运输量。磁性风暴。 因此，它对于太空天气研究很有价值。 由于太空天气代表了一系列危险，因此这项工作可能具有巨大的社会价值。