GEM: A Combined Simulation Model for the Magnetosphere: Global MHD Meets the Rice Convection Model

GEM：磁层组合仿真模型：全球 MHD 与水稻对流模型的结合

• 批准号: 9401699
• 负责人: Richard Wolf
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-03-01 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401699&HistoricalAwards=false
• 关键词: GEM; Combined; Simulation; Model; Magnetosphere

The objective is to develop a new computational model of the large- scale dynamics of the Earth's magnetosphere by merging two existing models: (i) the global 3d MHD code that was orginially developed at the Naval Research Laboratory, and (ii) the Rice Convection Model (RCM). The merged code will retain the self-consistency and comprehensiveness of the MHD code and will include the bow shock, magnetosheath, solar-wind/magnetosphere interactions, as well as the distant tail. But the merged code will also utilize the Rice Convection Model's finely gridded, many-fluid representation of the inner magnetosphere and near-Earth plasma sheet. In addition, the RCM's representation of the magnetospheric interior will be substanitally improved through the use of the self-consistent time- dependent magnetic field supplied by the MHD model. Merger of the two codes will be accomplished in three phases, with careful testing and analysis at each step. In each phase, the code will be used to simulate specific, well-observed magnetospheric events, and simulation results will be tested against observations obtained in GEM campaigns.

目标是通过合并两个现有的模型来开发一个新的地球磁层大尺度动力学计算模型：（i）最初在海军研究实验室开发的全球三维MHD代码，和（ii）Rice对流模型（RCM）。 合并后的代码将保留MHD代码的自洽性和全面性，并将包括弓形激波，磁鞘，太阳风/磁层相互作用，以及遥远的尾巴。 但合并后的代码也将利用赖斯对流模型的精细网格，内磁层和近地等离子体片的多流体表示。 此外，通过使用MHD模型提供的自洽时变磁场，RCM对磁层内部的描述将得到实质性的改进。 两个代码的合并将分三个阶段完成，每一步都要进行仔细的测试和分析。 在每一阶段，将使用该代码模拟具体的、观测良好的磁层事件，并将对照全球监测系统活动中获得的观测结果对模拟结果进行检验。