Low-Noise Collision Operators for Particle-in-Cell Simulations.

Lewandowski, J. L. V.

Technical Information Center Oak Ridge Tennessee

关键词: Collisional plasma;    Algorithms;    Energy conservation;    Simulation;    Numerical methods;   

RP-ID  :  DE2005837853

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A new method to implement low-noise collision operators in particle-in-cell simulations is presented. The method is based on the fact that relevant collision operators can be included naturally in the Lagrangian formulation that exemplifies the particle-in-cell simulation method. Numerical simulations show that the momentum and energy conservation properties of the simulated plasma associated with the low-noise collision operator are improved as compared with standard collision algorithms based on random numbers.