复分散系相函数在辐射介质传热中是关键参数,蒙特卡洛法兼具数值算法与试验测量的优点.利用该方法计算复分散系的多重散射相函数克服了以往算法的缺点,可以体现多重散射的影响,并且可以计算任意形状控制体的相函数.大量的数学实验发现当介质系密度增大时,散射能量在4π空间内分布趋于均匀.%Phase function of the compley distributed systems is the significant parameter in the field of radiative heat transfer in medium. The Monte-Carlo method bas the advantages of both numerical algorithm and experiment measurement. Multiple scattering pbase function of the complex distributed systems based on the Monte-Carlo method overcomes the former deficiency and expresses the influence of the multiple scattering, also, it can calculate phase functions of any controlled volume. According to a number of mathematical experiments, the larger the density of the medium is the better-proportioned the scattered energy is in the 4π solid space.
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