The Fluid-Kinetic Particle-in-Cell method for plasma simulations

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• 作者：Stefano Markidis^a ; ; Pierre Henri^b ; Giovanni Lapenta^c ; Kjell Rö ; nnmark^d ; Maria Hamrin^d ; Zakaria Meliani^e ; Erwin Laure^a
• 关键词：Computational plasma physics ; Fluid-kinetic particle-in-cell method ; Implicit particle-in-cell method
• 刊名：Journal of Computational Physics
• 出版年：15 August 2014
• 年：2014
• 卷：271
• 期：Complete
• 页码：415-429
• 全文大小：2719 K

文摘

A method that solves concurrently the multi-fluid and Maxwell's equations has been developed for plasma simulations. By calculating the stress tensor in the multi-fluid momentum equation by means of computational particles moving in a self-consistent electromagnetic field, the kinetic effects are retained while solving the multi-fluid equations. The Maxwell's and multi-fluid equations are discretized implicitly in time enabling kinetic simulations over time scales typical of the fluid simulations. The Fluid-Kinetic Particle-in-Cell method has been implemented in a three-dimensional electromagnetic code, and tested against the two-stream instability, the Weibel instability, the ion cyclotron resonance and magnetic reconnection problems. The method is a promising approach for coupling fluid and kinetic methods in a unified framework.