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本文用蒙特卡洛方法模拟气体分子入射一运动管道及其在管内的运动过程,然后在管道出口处把飞出管道的分子数目按角分布进行统计,从而得到运动管道出口分子束流的角分布图。它与通常讨论静止管道时的处理方法和角分布结果有较大的不同。从结果讨论中发现,管道运动速度与气体分子热运动速度之比值是决定运动管道出口分子束流角分布的一个重要参数。
In this paper, Monte Carlo method is used to simulate the movement of gas molecules incident on a moving pipe and its movement in the pipe. Then the number of molecules flying out of the pipe is statically distributed at the outlet of the pipe according to the angular distribution, so as to obtain the angular distribution of the molecular flow at the exit of the moving pipe Figure It is quite different from the treatment and angle distributions that are commonly discussed for stationary pipes. From the discussion of the results, it is found that the ratio of the pipe velocity to the molecular thermal velocity is an important parameter that determines the molecular beam angle distribution at the exit of a moving pipe.