Global Vlasov simulation on magnetospheres of astronomical objects

24th IUPAP Conference on Computational Physics

物理学;计算机科学

Umeda, Takayuki^1 ; Ito, Yosuke^1 ; Fukazawa, Keiichiro^2

Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan^1

Research Institute for Information Technology, Kyushu University, Fukuoka 812-8581, Japan^2

关键词: Astronomical objects;    Global simulation;    High scalabilities;    Kinetic equations;    Nonlinear medium;    Parallel Computation;    Self-consistent computer simulation;    Vlasov simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/454/1/012005/pdf
DOI  :  10.1088/1742-6596/454/1/012005

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

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.