烟尘中电磁波传输特性的Monte Carlo模拟

根据等效颗粒模型和分形理论，运用Mie理论和离散偶极子近似方法分别计算了烟尘簇团粒子在波长为06328?μm的电磁波入射情况下的单次散射特性.根据辐射输运理论，利用Monte Carlo方法对电磁波在烟尘中的传输特性进行数值计算，给出烟尘中反射率和透射率随入射角和烟尘厚度变化的数值结果，并分析了入射角、烟尘粒子的密度和厚度对反射率和透射率的影响.这为研究电磁波在密集分布介质中的传输特性提供了一种方法. 关键词： 烟尘粒子 离散偶极子近似 传输特性 Monte Carlo模拟

Monte Carlo simulation of transfer-characteristics of electromagnetic wave propagating in soot

Based on equivalent particulate model and fractal theory，using the Mie theory and discrete-dipole approximation，the scattering by aggregated soot particles of the 06328?μm incident wave is computed. Then based on radiation transportation theory，and numerically calculating the transfer-characteristics of electromagnetic wave propagating in soot by using Monte Carlo method，the author gets the relationships of the reflectivity and transmissivity of soot with the changing incident angles，soot thickness and density，and analyses these factors affecting the reflectivity and transmissivity. This provides an efficient approach to the research of transfer-characteristics of electromagnetic wave in poly-disperse highly dense media.
Keywords： soot particles discrete dipole approximation transfer-characteristics Monte Carlo simulation