Inverse Temperature Sampl ing under Direct Simulation Monte Carlo Method

doi:10.7652/xjtuxb200601006

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Inverse Temperature Sampl ing under Direct Simulation Monte Carlo Method

更新时间：2025-07-09

- Inverse Temperature Sampl ing under Direct Simulation Monte Carlo Method
- Vol. 40, Issue 1, Pages: 22-0025(2006)
- 作者机构：
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- DOI：10.7652/xjtuxb200601006
  CLC： TK124
- Online First：10 January 2006，
  
  Published：2006
- 稿件说明：
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Inverse Temperature Sampl ing under Direct Simulation Monte Carlo Method[J]. 2006, 40(1): 22-0025.
DOI：

Inverse Temperature Sampl ing under Direct Simulation Monte Carlo Method[J]. 2006, 40(1): 22-0025. DOI： 10.7652/xjtuxb200601006.

摘要

分子动力学出发

讨论了直接模拟蒙特卡罗方法中分子平均总能量、平均平动能以及边界 热流密度的抽样方法. 通过对与边界发生碰撞的分子进行统计平均

得到了分子反射能量与入射能 量以及边界热流密度的关系式. 在此基础上

通过结合壁面漫反射模型下分子反射速度的抽样方 法

发展了一种从边界热流求得与壁面碰撞分子的平均反射特征温度的逆温度抽样算法. 数值结果 表明:该算法能够由分子反射能量准确求得分子反射特征温度

进而求得分子反射速度

从而将边 界热流信息带入流场. 该方法为实现壁面处给定热流边界条件下的直接模拟蒙特卡罗方法提供了 途径.

Abstract

Based on the p rinciple of molecular dynamics

a sampling met hod in Direct Simulation Monte Carlo (DSMC) met hod for molecular total and t ranslational energy

and t he heat flux vec2 tor nearby t he wall boundary is propo sed. An important relationship among t he mean incident en2 ergy

reflective energy and t he wall boundary heat flux is obtained by statistically averaging t he energy values of t hose molecules colliding wit h wall . Combining the generating met hod of molec2 ular reflective t hermal velocities according to diff use reflection model

an algorit hm named as In2 ver se Temperat ure Sampling ( ITS) is developed

which enables to evaluate the molecular reflec2 tive characteristic temperature f rom t he molecular incident energy and t he boundary heat flux. The numerical result s show t hat t he molecular reflective temperature is accurately sampled wit h t his algorit hm

t hus the information of heat flux at wall boun

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