放射性气体在介质中扩散的有限差分计算与模拟

发布时间：2018-04-16 09:17

本文选题：放射性气体 + 扩散　；参考：《核电子学与探测技术》2017年03期

【摘要】：放射性气体的屏蔽是辐射防护领域的一个热点,而研究放射性气体在不同介质中的扩散行为是这项研究工作的关键。放射性气体在介质中扩散行为的数学解析计算过程较为复杂。本文首先阐述了放射性气体在介质中的扩散模型,然后将低浓度侧边界外推,再先后讨论了显式与隐式有限差分法的计算方法,最后通过数值计算实验和模拟应用试验考察,讨论了它们的误差与在现实应用的可行性与精度。在进一步的研究之后,可以应用数值法代替传统的解析法模拟计算相关的放射性气体在介质中扩散的扩散行为,从而提高计算效率。
[Abstract]:The shielding of radioactive gases is a hot topic in the field of radiation protection, and the study of the diffusion behavior of radioactive gases in different media is the key of this work.The mathematical analytical calculation of diffusion behavior of radioactive gas in medium is complicated.In this paper, the diffusion model of radioactive gas in medium is first expounded, then the lateral boundary of low concentration is extrapolated, then the explicit and implicit finite difference method is discussed successively. Finally, the numerical calculation experiment and simulation application experiment are carried out.Their errors and the feasibility and accuracy of their application in reality are discussed.After further study, the numerical method can be used instead of the traditional analytical method to simulate and calculate the diffusion behavior of the radioactive gas in the medium, so as to improve the efficiency of calculation.
【作者单位】：南华大学核科学技术学院;
【基金】：国家自然科学基金资助项目(11275094) 中国科学院战略性先导科技专项资金资助项目(XDA10010500)
【分类号】：TL752

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