电推进粒子网格法模拟中计算加速方法的研究综述

Research review of computational acceleration methods for particle-in-cell simulations of electric propulsion

粒子网格法(PIC)模拟电推进装置等离子体时具有很强的第一性,但是模拟过程中计算负载很大,故PIC模拟的计算加速方法不可或缺。本文从电推进装置基本性质、低温等离子体物理特性和PIC算法特点作为切入点,明确了PIC方法在电推进装置模拟过程中计算负载高的原因;结合国内外的研究现状,从建模、时空尺度、算法与并行三个层面介绍了对应计算加速方法的原理和效果;对各类计算加速方法进行了总结和展望。

Particle-in-cell(PIC)simulation has a strong characteristic of first principle when simulating plasma in electric propulsion(EP)devices,but the calculation load is heavy during the simulation process.Thus,the acceleration methods for PIC algorithms are essential for the simulation.The calculation bottlenecks of PIC algorithm simulating EP devices are analyzed first,which are derived by the fundamental characteristics of EP devices,the physical properties of low-temperature plasmas,and the features of the PIC algorithm.At the same time,with the current research status at home and abroad,the principles and effects of corresponding calcu⁃lation acceleration methods are introduced from three aspects:modeling,spatiotemporal scales,as well as the al⁃gorithm and parallelization.Finally,a summary is made to outlook the various calculation acceleration methods.