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真空模拟软件大多是基于蒙特卡罗法开发,尚缺少成熟的商业软件。基于热辐射和真空分子流物理机理上的相似性,可以采用热辐射等效来模拟真空分子流。本文利用理想气体状态方程和分子运动论推导出了利用热辐射模拟进行真空管道传输几率计算的公式,利用ANSYS软件进行了二维和三维的热辐射模拟,利用公式计算得到的圆柱管和圆截面直角弯管传输几率和文献基本相符。此外针对二维模拟还分析了不同参数和网格尺寸对计算结果的影响。由于商业软件计算的便利性,热辐射等效方法可以高效地完成复杂模型的分析,为传输几率计算提供一种新的选择。
Most of the vacuum simulation software is developed based on Monte Carlo method, but there is still a lack of mature commercial software. Based on the physical and physical similarities between thermal radiation and vacuum molecular flow, thermal radiation equivalence can be used to simulate vacuum molecular flow. In this paper, the formulas of the probability of vacuum pipeline transmission using thermal radiation simulation are deduced by using ideal gas equation of state and molecular motion theory. Two-dimensional and three-dimensional thermal radiation simulation are carried out by ANSYS software. The cylindrical tube and circular section Right-angle elbow transmission probability basically consistent with the literature. In addition, the influence of different parameters and grid size on the calculation results is also analyzed for two-dimensional simulation. Due to the convenience of commercial software calculation, the equivalent method of thermal radiation can efficiently analyze complex models and provide a new choice for the transmission probability calculation.