Benchmark simulations of radiative transfer in participating binary stochastic mixtures in two dimensions  

作　　者：Cong-Zhang Gao Ying Cai Jian-Wei Yin Zheng-Feng Fan Pei Wang Shao-Ping Zhu Cheng-Wu Huang Yang Zhao Jia-Min Yang 

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100088,People’s Republic of China [2]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang,Sichuan 621900,People’s Republic of China

出　　处：《Matter and Radiation at Extremes》2024年第6期81-93,共13页极端条件下的物质与辐射（英文）

基　　金：financial support by the National Natural Science Foundation of China(Grant No.12374259);funded by the National Natural Science Foundation of China under Grant No.12375235。

摘　　要：We study radiative transfer in participating binary stochastic mixtures in two dimensions(2D)by developing an accurate and efficient simulation tool.For two different sets of physical parameters,2D benchmark results are presented,and it is found that the influence of the stochastic mixture on radiative transfer is clearly parameter-dependent.Our results confirm that previous multidimensional results obtained in different studies are basically consistent,which is interpreted in terms of the relationship between the photon mean free path l_(p)and the system size L.Nonlinear effects,including those due to scattering and radiation-material coupling,are also discussed.To further understand the particle size effect,we employ a dimensionless parameter l_(p)/L,from which a critical particle size can be derived.On the basis of further 2D simulations,we find that an inhomogeneous mix is obtained for l_(p)/L>0.1.Furthermore,2D material temperature distributions reveal that self-shielding and particle-particle shielding of radiation occur,and are enhanced when l_(p)/L is increased.Our work is expected to provide benchmark results to verify proposed homogenized models and/or other codes for stochastic radiative transfer in realistic physical scenarios.

关 键 词：STOCHASTIC RADIATIVE DIMENSIONS 

分 类 号：TL632[核科学技术—核技术及应用]