Merging for Particle-Mesh Complex Particle Kinetic modeling of the multiple plasma beams
- 作者：Alexander S. Lipatov ; alexander.lipatov-1@nasa.gov ; alipatov@umbc.edu
- 关键词：Finite-size particles ; Particle-in-cell method ; Complex Particle Kinetic method ; Aggressive fragmentation and merging of the particles ; Collisionless shocks ; Particle acceleration ; Beams
- 刊名：Journal of Computational Physics
- 出版年：2012
- 期刊代码：136_00219991
- 类别：cp
- 出版时间：20 April, 2012
- 卷：231
- 期：8
- 页码：3101-3118
- 文件大小：1189 K
摘要
We suggest a merging procedure for the Particle-Mesh Complex Particle Kinetic (PMCPK) method in case of inter-penetrating flow (multiple plasma beams). We examine the standard particle-in-cell (PIC) and the PMCPK methods in the case of particle acceleration by shock surfing for a wide range of the control numerical parameters. The plasma dynamics is described by a hybrid (particle-ion-fluid-electron) model. Note that one may need a mesh if modeling with the computation of an electromagnetic field. Our calculations use specified, time-independent electromagnetic fields for the shock, rather than self-consistently generated fields. While a particle-mesh method is a well-verified approach, the CPK method seems to be a good approach for multiscale modeling that includes multiple regions with various particle/fluid plasma behavior. However, the CPK method is still in need of a verification for studying the basic plasma phenomena: particle heating and acceleration by collisionless shocks, magnetic field reconnection, beam dynamics, etc.