Plasma simulation studies using multilevel physics models
Plasma simulation studies using multilevel physics models
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DOI：
10.2172/750291
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发表时间：
1999-04
期刊：
影响因子：
--
通讯作者：
W. Park;E. Belova;G. Fu
中科院分区：
文献类型：
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作者：
W. Park;E. Belova;G. Fu
如何进行更现实的等离子体模拟研究，使用不断增加的计算能力的问题得到解决。这里给出的答案是M3 D（多级3D）项目，该项目开发了一个具有物理层次结构的代码包，可以解决越来越完整的相空间子集，因此越来越逼真。给出了多层物理模型的基本原理。描述了每个物理水平并给出了其应用示例。现有的物理层是流体模型（3D组态空间），即磁流体动力学（MHD）和双流体;和混合模型，即回旋动力学-能量-粒子/MHD（5D能量粒子相空间），回旋动力学-粒子-离子/流体-电子（5D离子相空间）和全动力学-粒子-离子/流体-电子水平（6D离子相空间）。解析电子相空间（5D或6D）仍然是一个未来的项目。相-空间-流体模型不用于支持Δ f粒子模型。一个实用的和准确的非碰撞等离子体的非线性流体封闭似乎不太可能在不久的将来。
The question of how to proceed toward ever more realistic plasma simulation studies using ever increasing computing power is addressed. The answer presented here is the M3D (Multilevel 3D) project, which has developed a code package with a hierarchy of physics levels that resolve increasingly complete subsets of phase-spaces and are thus increasingly more realistic. The rationale for the multilevel physics models is given. Each physics level is described and examples of its application are given. The existing physics levels are fluid models (3D configuration space), namely magnetohydrodynamic (MHD) and two-fluids; and hybrid models, namely gyrokinetic-energetic-particle/MHD (5D energetic particle phase-space), gyrokinetic-particle-ion/fluid-electron (5D ion phase-space), and full-kinetic-particle-ion/fluid-electron level (6D ion phase-space). Resolving electron phase-space (5D or 6D) remains a future project. Phase-space-fluid models are not used in favor of delta f particle models. A practical and accurate nonlinear fluid closure for noncollisional plasmas seems not likely in the near future.