非常密集随机分布球粒子相关散射的数值模拟  

Numerical Simulation of Correlated Scattering by Very Dense Randomly Distributed Spherical Particles

作　　者：杨青[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射与遥感信息教育部重点实验室,上海200433

出　　处：《计算物理》2006年第4期379-386,共8页Chinese Journal of Computational Physics

基　　金：国家重点基础研究项目(2001CB309400);国家自然科学基金(60571050)资助项目

摘　　要：讨论非常密集(占空比>0.4)随机分布球粒子的散射.用Monte Carlo方法和随机搅拌产生非常密集随机分布粒子,求解电场体积分方程的解,获得散射、吸收和消光系数及有效介电常数.与现有的准晶体近似、具有相干势的准晶体近似和Maxwell_Garnett混合方程等几种方法作了比较.非常密集随机分布粒子表现出群聚性产生的大粒子散射效应.Correlated scattering of very dense（fractional volume more than 0.4） randomly distributed spherical particles is studied. A Monte Carlo method and a random shuffling process are employed to generate the very dense and randomly distributed particles. With solution of the volumetric integral equation of the electric fields, the scattering, absorption and extinction coefficients, as well as effective permittivity of the very dense and randomly distributed spherical particles are numerically calculated. For a validation purpose, they are compared with other approaches such as QCA, QCA-CP and Maxwell-Gamett mixing formula at lower fractions. It shows that very dense particles demonstrate particles clustering and enhance the scattering of bigger or clustered particles.

关 键 词：非常密集 相关散射 MONTE Cado数值方法 

分 类 号：O441.4[理学—电磁学] TN011[理学—物理]