A hybrid method with deviational particles for spatial inhomogeneous plasma

作者：Yan Bokai^*

来源：Journal of Computational Physics, 2016, 309: 18-36.

DOI：10.1016/j.jcp.2015.12.050

• Deviational particles
• Monte Carlo methods
• Plasma physics
• Vlasov-Poisson-Landau system
• Macro-micro projection
• Hybrid methods

In this work we propose a Hybrid method with Deviational Particles (HDP) for a plasma modeled by the inhomogeneous Vlasov-Poisson-Landau system. We split the distribution into a Maxwellian part evolved by a grid based fluid solver and a deviation part simulated by numerical particles. These particles, named deviational particles, could be both positive and negative. We combine the Monte Carlo method proposed in [31], a Particle in Cell method and a Macro-Micro decomposition method [3] to design an efficient hybrid method. Furthermore, coarse particles are employed to accelerate the simulation. A particle resampling technique on both deviational particles and coarse particles is also investigated and improved. This method is applicable in allregimes and significantly more efficient compared to a PIC-DSMC method near the fluid regime.

• 出版日期2016-3-15