蒙特卡洛模拟漫辐射时两种确定表面发射方向方法的比较

计算物理 ›› 2006, Vol. 23 ›› Issue (4): 457-460.

蒙特卡洛模拟漫辐射时两种确定表面发射方向方法的比较

李鹏, 肖泽娟, 程惠尔

上海交通大学航空航天工程系, 上海 200030

收稿日期:2005-03-15 出版日期:2006-07-25 发布日期:2006-07-25
作者简介:李鹏(1977-),男,河北沧州,博士生,从事空间传热数值计算研究,上海交通大学航空航天工程系,200030.

Determination of Emissive Direction from a Diffusing Surface in Monte Carlo Simulations

LI Peng, XIAO Ze-juan, CHENG Hui-er

Department of Aeronautical and Astronautical Engineering, Shanghai Jiaotong University, Shanghai 200030, China

Received:2005-03-15 Online:2006-07-25 Published:2006-07-25

摘要/Abstract

摘要： 介绍一种有效的确定能束发射方向的方法——切球法.分析传统方法和切球法确定发射方向的原理及实施过程,说明切球法更为方便.采用2种方法对一简单的几何模型的角系数进行蒙特卡洛计算,所得结果与文献中积分结果进行比较,说明了切球法的可行性,计算精度能满足工程要求.同时对2种方法的计算耗时进行比较,切球法可以节省计算时间.将切球法应用到复杂系统中其优越性将会得到更加充分体现.

关键词: 蒙特卡洛法, 漫辐射表面, 发射方向, 切球法

Abstract: We introduce an effective method to determine the emissive direction of energy bundles from a diffusing surface,which is called a tangent sphere method.The principle and implement process of the conventional method,and the tangent sphere method are analysed.It shows that the tangent sphere method is more convenient.A Monte Carlo simulation is applied to a simple model.A comparison of numerical results and integral results shows that the tangent sphere method is feasible and its precision meets engineering requirment.A comparison of computing time shows that the computational speed of the tangent sphere method is superior to that of the conventional method.

Key words: Monte Carlo method, diffuse surface, emissive direction, tangent sphere method

中图分类号:

O432

李鹏, 肖泽娟, 程惠尔. 蒙特卡洛模拟漫辐射时两种确定表面发射方向方法的比较[J]. 计算物理, 2006, 23(4): 457-460.

LI Peng, XIAO Ze-juan, CHENG Hui-er. Determination of Emissive Direction from a Diffusing Surface in Monte Carlo Simulations[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2006, 23(4): 457-460.