Low-order dynamical models for non-linear fluid behaviour in quasi two-dimensional plasmas

准二维等离子体中非线性流体行为的低阶动力学模型

• 批准号: LX0347292
• 负责人: Dr Rowena Ball
• 金额: $ 0.62万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage - International
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-07-21 至 2005-07-20
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LX0347292
• 关键词: Low; order; dynamical; models; non

Two complex systems in which a magnetic field imposes two-dimensional fluid motions are turbulent fusion plasmas and magnetospheric plasmas. A distinctive property of 2D flows is the inverse energy cascade, whereby energy streaming into large-scale vortices, coherent structures, or sheared flows gives a remarkable propensity for self-organizing behaviour. This can be exploited to govern or guide our response to such systems. We propose to investigate the dynamics of momentum and energy exchange in these plasmas, using reduced dynamical models and bifurcation and stability mathematics. Expected outcomes are improved prediction of magnetospheric substorms and confinement of fusion plasmas.

磁场施加二维流体运动的两个复杂系统是湍流聚变等离子体和磁层等离子体。二维流的一个独特特性是反向能量级联，能量流进入大规模漩涡、连贯结构或剪切流，具有显著的自组织行为倾向。这可以用来管理或指导我们对此类系统的反应。我们建议使用简化的动力学模型和分岔和稳定性数学来研究这些等离子体中的动量和能量交换动力学。预期的结果是改进磁层亚暴的预测和聚变等离子体的限制。