气-固界面作用物理模型的确定性实现方法

doi:10.19596/j.cnki.1001-246x.8207

计算物理 ›› 2021, Vol. 38 ›› Issue (2): 183-191.DOI: 10.19596/j.cnki.1001-246x.8207

气-固界面作用物理模型的确定性实现方法

高媛¹, 梁腾飞²

1. 洛阳广播电视大学, 河南洛阳 471000;
2. 西北工业大学航天学院, 陕西西安 710072

收稿日期:2020-02-28 修回日期:2020-07-06 发布日期:2021-09-29
通讯作者: 梁腾飞,副教授,主要从事基于粒子模拟/细观计算力学方法研究,E-mail:tfliang@nwpu.edu.cn
作者简介:高媛(1989-),助教,从事计算流体力学研究,E-mail:lygaoyuan1989@126.com
基金资助:
国家自然科学基金（11602198）及中国博士后科学基金（2018M643725）资助项目

Deterministic Implementation Algorithm of a Physical-based Gas-surface Interaction Model

GAO Yuan¹, LIANG Tengfei²

1. Louyang Radio and Television University, Luoyang, Henan 471000, China;
2. School of Astronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China

Received:2020-02-28 Revised:2020-07-06 Published:2021-09-29

摘要/Abstract

摘要： 针对最新发展的气-固界面作用物理模型，提出一种确定性计算方法。算法的核心是：针对离散速度空间分布函数，采用确定性算法计算出单轮气-固碰撞作用的散射核函数矩阵，并通过考虑吸引势阱作用和迭代累加多次气-固碰撞作用，物理地反映气体分子入射/反射速度分布函数在气-固界面上的变化。与现有基于Monte Carlo随机采样的实现方法对比，该确定性实现方法可以快速且准确地计算边界上气体分子入射/反射速度分布函数的映射关系。因此，该方法可为以离散速度空间为基础的稀薄气体流动模拟方法提供先进的边界条件。

关键词: 稀薄气体流动, 边界条件, 气-固界面作用物理模型, 确定性算法

Abstract: A deterministic algorithm is developed to implement a physical-based gas-surface interaction model. The key of the algorithm is to calculate discretized matrix by a deterministic way, which represents the scattering kernel of single gas-surface collision and governs the gas molecular velocity distribution function.By considering the attractive potential well and successive gas-surface collisions, this algorithm describes physically the variation of gas molecular velocity distribution functions at the interface.Comparing with existing stochastic implementation algorithm based on Monte Carlo sampling, this deterministic implementation algorithm calculates accurately and efficiently the relation between incident and reflected velocity distributions of gas molecules. Therefore, it provides a better boundary condition for the deterministic simulation methods of rarefied gas flows based on discretized velocity space.

Key words: rarefied gas flows, boundary condition, physical-based gas-surface interaction model, deterministic algorithm

中图分类号:

O356

高媛, 梁腾飞. 气-固界面作用物理模型的确定性实现方法[J]. 计算物理, 2021, 38(2): 183-191.

GAO Yuan, LIANG Tengfei. Deterministic Implementation Algorithm of a Physical-based Gas-surface Interaction Model[J]. Chinese Journal of Computational Physics, 2021, 38(2): 183-191.

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气-固界面作用物理模型的确定性实现方法

Deterministic Implementation Algorithm of a Physical-based Gas-surface Interaction Model

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