基于碰撞距离的微通道内气体流动的DSMC模拟

DSMC Simulation of Gaseous Flow in Micro-channel Based on Collision Distance

用直接蒙特卡罗模拟方法对微通道内气体流动的部分特性进行了研究,并给出了与此方法相关的模型.在直接模拟中引入碰撞距离的思想进行碰撞对的选取,减少了存储量,保证了模拟结果的正确.在程序的编制中充分运用了Matlab语言的特点,简化了程序的设计.

In this paper, the some characteristics of gaseous flow in micro-channel are examined using Direct Simulation Monte Carlo method, and some models related to this method is presented. In the direct simulation method, collision distance is introduced, which can avoid restriction that cell dimension should be of the order of one third of the local mean free path. The dynamic feature of mathematical tools MAT- LAB is fully exploited which simplifies the design code.