Discrete-particle effects on Landau damping in particle-in-cell simulation

S. H. Chen, G. R. Wu, P. Y. Lai, Y. R. Linliu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The discrete-particle effects in particle-in-cell (PIC) simulations can numerically enhance the thermalization of collisionless plasmas, such that they can potentially change the dynamic properties of the simulated plasma system. The simulation results show that the numerical fluctuation induced by discrete-particle effects can be remedied by taking ensemble average over many computer runs to obtain the Landau damping rate, which is consistent with the theoretical estimation. But the nonlinear phase trapping can only be recovered from the numerical noise by using a reasonable number of macro-particle number in a Debye region. Moreover, both Krook-type and head-on collision models are implemented in the PIC simulation for studying the Landau damping in collisional plasmas. The convergence of numerical results due to discrete-particle effects in PIC simulations will be discussed in the paper.

Original languageEnglish
Title of host publication44th EPS Conference on Plasma Physics, EPS 2017
EditorsA. Bret, M. Fajardo, E. Westerhof, A. Melzer, B. Dromey, C. Riconda
PublisherEuropean Physical Society (EPS)
ISBN (Print)9781510849303
StatePublished - 2017
Event44th European Physical Society Conference on Plasma Physics, EPS 2017 - Belfast, United Kingdom
Duration: 26 Jun 201730 Jun 2017

Publication series

Name44th EPS Conference on Plasma Physics, EPS 2017

Conference

Conference44th European Physical Society Conference on Plasma Physics, EPS 2017
Country/TerritoryUnited Kingdom
CityBelfast
Period26/06/1730/06/17

Keywords

  • Discrete particle effects
  • Landau damping
  • Numerical thermalization
  • Particle collision
  • Particle-in-cell Simulation

Fingerprint

Dive into the research topics of 'Discrete-particle effects on Landau damping in particle-in-cell simulation'. Together they form a unique fingerprint.

Cite this