GEM Postdoc: Cross-scale Coupling in Collisionless Magnetic Reconnection: Two Fluid Simulations

GEM 博士后：无碰撞磁重联中的跨尺度耦合：两种流体模拟

• 批准号: 1027185
• 负责人: A Surjalal Sharma
• 金额: $ 5万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-02-01 至 2015-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1027185&HistoricalAwards=false
• 关键词: GEM; Postdoc; Cross; scale; Coupling

This project will develope a new code for the simulation of magnetic reconnection. The code will treat the electrons and ions as separate but coupled fluids. The first step will be the development of a solver for the equations of the electric field and magnetic field. The next step is to develop a module that solves for the equations governing the electron fluid. This module will have the capability of switching on or off different terms in the electron equations in order to study the effects of the different terms. Once the electron fluid code has been fully developed the ion fluid modlue can be quickly derived from the electron fluid. The final step will be to couple the electron and ion fluids and the electric and magnetic field solvers. By treating the electrons and ions as separate fluids the new code will have the ability to investigate cross-scale coupling in collisionless magnetic reconnection. Collisionless reconnection is the most important process that couples the energy in the solar wind into Earth's magnetosphere and eventually down to the ionosphere and neutral atmosphere. Collisionless reconnection is also a critically important process in the generation of magnetic substorms and storms.

本计画将发展一套新的磁重联模拟程式。 该代码将把电子和离子视为独立但耦合的流体。 第一步将是开发电场和磁场方程的求解器。 下一步是开发一个模块来求解控制电子流体的方程。 该模块将能够打开或关闭电子方程中的不同项，以研究不同项的影响。 一旦电子流体程序被完全开发出来，离子流体模型就可以很快地从电子流体中导出。 最后一步将是耦合电子和离子流体和电场和磁场求解器。 通过将电子和离子作为单独的流体处理，新的代码将有能力研究无碰撞磁场重联中的跨尺度耦合。 无碰撞重联是将太阳风中的能量耦合到地球磁层并最终到达电离层和中性大气层的最重要过程。 无碰撞重联也是磁亚暴和磁暴产生的一个重要过程。