Global Vlasov simulation on magnetospheres of astronomical objects
Global Vlasov simulation on magnetospheres of astronomical objects
复制标题
天体磁层的全局 Vlasov 模拟
DOI：
10.1088/1742-6596/454/1/012005
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
K. Fukazawa
中科院分区：
文献类型：
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作者：
T. Umeda;Y. Ito;K. Fukazawa
空间等离子体是一种无碰撞、多尺度、高度非线性的介质。有各种类型的自洽计算机模拟，根据各种近似处理空间等离子体。我们开发了求解Vlasov（无碰撞玻尔兹曼）方程的数值格式，该方程是无碰撞等离子体的第一性动力学方程。弱伸缩基准测试表明，我们的并行Vlasov代码实现了高性能和高可扩展性。目前，我们使用了1000多个核进行并行计算，并将现有的并行弗拉索夫代码应用于空间等离子体的各种跨尺度过程，例如太阳/恒星风与天体磁层相互作用的全局模拟。
Space plasma is a collisionless, multi-scale, and highly nonlinear medium. There are various types of self-consistent computer simulations that treat space plasma according to various approximations. We develop numerical schemes for solving the Vlasov (collisionless Boltzmann) equation, which is the first-principle kinetic equation for collisionless plasma. The weak-scaling benchmark test shows that our parallel Vlasov code achieves a high performance and a high scalability. Currently, we use more than 1000 cores for parallel computations and apply the present parallel Vlasov code to various cross-scale processes in space plasma, such as a global simulation on the interaction between solar/stellar wind and magnetospheres of astronomical objects.