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Numerical Model for Molecular and Particulate Contamination Transport

机译:分子和颗粒污染物迁移的数值模型

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摘要

A new model for simulating molecular and particulate contamination transport is described. This model is implemented in the Contamination Transport Simulation Program (CTSP). The code uses techniques found in rarefied gas and plasma dynamics codes and represents the contaminants as simulation macroparticles. This kinetic approach allows the code to consider external forces and interparticle interactions. Macroscopic properties such as contaminant plume partial pressure can also be computed. CTSP implements various contamination-specific material sources including a detailed model for molecular outgassing and a model for particulate detachment. The code is demonstrated with four examples focusing on mass transport between two parallel plates, computation of the steady-state equilibrium in a closed vessel, characterization of a test article outgassing rate from a quartz crystal microbalance measurement, and the use of purge gas to reduce the particulate fallout in atmospheric conditions. Simulation results are compared to analytical models.
机译:描述了一种用于模拟分子和颗粒污染物迁移的新模型。该模型在“污染物运输模拟程序”(CTSP)中实现。该代码使用稀有气体和等离子体动力学代码中的技术,并将污染物表示为模拟大颗粒。这种动力学方法使代码可以考虑外力和粒子间的相互作用。也可以计算宏观特性,例如污染物羽流分压。 CTSP实现了各种特定于污染的材料来源,包括用于分子除气的详细模型和用于颗粒分离的模型。该代码用四个示例进行了演示,这些示例侧重于两个平行板之间的质量传递,在密闭容器中计算稳态平衡,通过石英晶体微量天平测量表征测试物品的除气率,以及使用吹扫气体来减少大气条件下的颗粒物沉降。仿真结果与分析模型进行比较。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2019年第2期|485-497|共13页
  • 作者

    Brieda Lubos;

  • 作者单位

    Particle Cell Consulting LLC, Westlake Village, CA 91362 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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