基于PIC模拟的中性气体多元多相模型及其数值求解  

A Two-dimensional Model Based on PIC Simulation for Multi-element and Multi-phase Neutral Gas and its Numerical Solution

作　　者：屈马林[1] 王甲富[1] 刘佳鑫[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《空军工程大学学报（自然科学版）》2007年第4期84-87,共4页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：陕西省自然科学基金资助项目(2006A16)

摘　　要：针对PIC模拟程序中性粒子状态的描述问题,建立了等离子体中多元多相中性气体的流体模型,研究了与其相关的边界条件的处理方法,采用二阶精度的Beam-Warming差分格式进行数值方法,成功地应用于气体绝热点源扩散过程的数值运算,所得结果与理论取得很好的一致。该模型将用于扩充PIC粒子模拟程序对中性粒子状态的描述。To deal with the lack of detailed depiction of neutral gas in PIC simulation, the paper presents a two - dimensional model of multi - element and multi - phase neutral gas to depict explicitly the fields of neutral gas in plasma region. Numerical methods of solving the proposed equations as well as various boundary conditions are put forward. The above model and method are applied to the simulation of adiabatic gas diffusion. The results obtained well accord with the theory. The model can be used in improving PIC simulation programs.

关 键 词：多元多相 PIC粒子模拟 Beam—Warming数值方法 

分 类 号：O53[理学—等离子体物理]