面向等离子体金属中氦气泡生长和密度的理论模型

Theoretical Model of Helium Bubble Growth and Density in Plasma-Facing Metals.

作者信息

Hammond Karl D, Maroudas Dimitrios, Wirth Brian D

机构信息

Department of Biomedical, Biological, and Chemical Engineering, University of Missouri, Columbia, MO, 65211, USA.

Nuclear Engineering Program, University of Missouri, Columbia, MO, 65211, USA.

出版信息

Sci Rep. 2020 Feb 10;10(1):2192. doi: 10.1038/s41598-020-58581-8.

DOI:10.1038/s41598-020-58581-8

PMID:32041995

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7010674/

Abstract

We present a theoretically-motivated model of helium bubble density as a function of volume for high-pressure helium bubbles in plasma-facing tungsten. The model is a good match to the empirical correlation we published previously [Hammond et al., Acta Mater. 144, 561-578 (2018)] for small bubbles, but the current model uses no adjustable parameters. The model is likely applicable to significantly larger bubbles than the ones examined here, and its assumptions can be extended trivially to other metals and gases. We expect the model to be broadly applicable and useful in coarse-grained models of gas transport in metals.

摘要

我们提出了一个基于理论的模型，用于描述面向等离子体的钨中高压氦气泡的密度随体积的变化关系。该模型与我们之前发表的关于小气泡的经验关联式[哈蒙德等人，《材料学报》144卷，561 - 578页（2018年）]非常吻合，但当前模型未使用可调参数。该模型可能适用于比此处研究的气泡大得多的气泡，并且其假设可以很容易地扩展到其他金属和气体。我们预计该模型在金属中气体输运的粗粒度模型中将具有广泛的适用性和实用性。